diff --git a/src/java.desktop/share/legal/lcms.md b/src/java.desktop/share/legal/lcms.md
index d3bd7d84c8b..20a22ea4db5 100644
--- a/src/java.desktop/share/legal/lcms.md
+++ b/src/java.desktop/share/legal/lcms.md
@@ -1,11 +1,11 @@
-## Little Color Management System (LCMS) v2.17
+## Little Color Management System (LCMS) v2.18
 
 ### LCMS License
 <pre>
 
 MIT License
 
-Copyright (C) 1998-2025 Marti Maria Saguer
+Copyright (C) 1998-2026 Marti Maria Saguer
 
 Permission is hereby granted, free of charge, to any person obtaining
 a copy of this software and associated documentation files (the "Software"),
diff --git a/src/java.desktop/share/native/liblcms/cmsalpha.c b/src/java.desktop/share/native/liblcms/cmsalpha.c
index 2e50b65be24..bcedbde938e 100644
--- a/src/java.desktop/share/native/liblcms/cmsalpha.c
+++ b/src/java.desktop/share/native/liblcms/cmsalpha.c
@@ -30,7 +30,7 @@
 //---------------------------------------------------------------------------------
 //
 //  Little Color Management System
-//  Copyright (c) 1998-2024 Marti Maria Saguer
+//  Copyright (c) 1998-2026 Marti Maria Saguer
 //
 // Permission is hereby granted, free of charge, to any person obtaining
 // a copy of this software and associated documentation files (the "Software"),
@@ -406,7 +406,7 @@ int FormatterPos(cmsUInt32Number frm)
 static
 cmsFormatterAlphaFn _cmsGetFormatterAlpha(cmsContext id, cmsUInt32Number in, cmsUInt32Number out)
 {
-static cmsFormatterAlphaFn FormattersAlpha[6][6] = {
+static const cmsFormatterAlphaFn FormattersAlpha[6][6] = {
 
        /* from 8 */  { copy8,       from8to16,   from8to16SE,   from8toHLF,   from8toFLT,    from8toDBL    },
        /* from 16*/  { from16to8,   copy16,      from16to16,    from16toHLF,  from16toFLT,   from16toDBL   },
diff --git a/src/java.desktop/share/native/liblcms/cmscam02.c b/src/java.desktop/share/native/liblcms/cmscam02.c
index 45ef4eef970..168ef597032 100644
--- a/src/java.desktop/share/native/liblcms/cmscam02.c
+++ b/src/java.desktop/share/native/liblcms/cmscam02.c
@@ -30,7 +30,7 @@
 //---------------------------------------------------------------------------------
 //
 //  Little Color Management System
-//  Copyright (c) 1998-2024 Marti Maria Saguer
+//  Copyright (c) 1998-2026 Marti Maria Saguer
 //
 // Permission is hereby granted, free of charge, to any person obtaining
 // a copy of this software and associated documentation files (the "Software"),
@@ -285,27 +285,32 @@ CAM02COLOR InverseCorrelates(CAM02COLOR clr, cmsCIECAM02* pMod)
            (clr.J / 100.0),
            (1.0 / (pMod->c * pMod->z)));
 
-    p1 = e / t;
     p2 = (clr.A / pMod->Nbb) + 0.305;
-    p3 = 21.0 / 20.0;
 
-    hr = clr.h * d2r;
-
-    if (fabs(sin(hr)) >= fabs(cos(hr))) {
-        p4 = p1 / sin(hr);
-        clr.b = (p2 * (2.0 + p3) * (460.0 / 1403.0)) /
-            (p4 + (2.0 + p3) * (220.0 / 1403.0) *
-            (cos(hr) / sin(hr)) - (27.0 / 1403.0) +
-            p3 * (6300.0 / 1403.0));
-        clr.a = clr.b * (cos(hr) / sin(hr));
+    if ( t <= 0.0 ) {     // special case from spec notes, avoid divide by zero
+        clr.a = clr.b = 0.0;
     }
     else {
-        p5 = p1 / cos(hr);
-        clr.a = (p2 * (2.0 + p3) * (460.0 / 1403.0)) /
-            (p5 + (2.0 + p3) * (220.0 / 1403.0) -
-            ((27.0 / 1403.0) - p3 * (6300.0 / 1403.0)) *
-            (sin(hr) / cos(hr)));
-        clr.b = clr.a * (sin(hr) / cos(hr));
+        hr = clr.h * d2r;
+        p1 = e / t;
+        p3 = 21.0 / 20.0;
+
+        if (fabs(sin(hr)) >= fabs(cos(hr))) {
+            p4 = p1 / sin(hr);
+            clr.b = (p2 * (2.0 + p3) * (460.0 / 1403.0)) /
+                (p4 + (2.0 + p3) * (220.0 / 1403.0) *
+                (cos(hr) / sin(hr)) - (27.0 / 1403.0) +
+                p3 * (6300.0 / 1403.0));
+            clr.a = clr.b * (cos(hr) / sin(hr));
+        }
+        else {
+            p5 = p1 / cos(hr);
+            clr.a = (p2 * (2.0 + p3) * (460.0 / 1403.0)) /
+                (p5 + (2.0 + p3) * (220.0 / 1403.0) -
+                ((27.0 / 1403.0) - p3 * (6300.0 / 1403.0)) *
+                (sin(hr) / cos(hr)));
+            clr.b = clr.a * (sin(hr) / cos(hr));
+        }
     }
 
     clr.RGBpa[0] = ((460.0 / 1403.0) * p2) +
diff --git a/src/java.desktop/share/native/liblcms/cmscgats.c b/src/java.desktop/share/native/liblcms/cmscgats.c
index 3e62d064c3f..e8a75c7355f 100644
--- a/src/java.desktop/share/native/liblcms/cmscgats.c
+++ b/src/java.desktop/share/native/liblcms/cmscgats.c
@@ -30,7 +30,7 @@
 //---------------------------------------------------------------------------------
 //
 //  Little Color Management System
-//  Copyright (c) 1998-2024 Marti Maria Saguer
+//  Copyright (c) 1998-2026 Marti Maria Saguer
 //
 // Permission is hereby granted, free of charge, to any person obtaining
 // a copy of this software and associated documentation files (the "Software"),
@@ -295,7 +295,7 @@ typedef struct {
         WRITEMODE as;      // How is supposed to be written
     } PROPERTY;
 
-static PROPERTY PredefinedProperties[] = {
+static const PROPERTY PredefinedProperties[] = {
 
         {"NUMBER_OF_FIELDS", WRITE_UNCOOKED},    // Required - NUMBER OF FIELDS
         {"NUMBER_OF_SETS",   WRITE_UNCOOKED},    // Required - NUMBER OF SETS
@@ -458,7 +458,7 @@ cmsBool StringAppend(string* s, char c)
         new_ptr = (char*) AllocChunk(s->it8, s->max);
         if (new_ptr == NULL) return FALSE;
 
-        if (new_ptr != NULL && s->begin != NULL)
+        if (s->begin != NULL)
             memcpy(new_ptr, s->begin, s->len);
 
         s->begin = new_ptr;
@@ -899,6 +899,11 @@ void InSymbol(cmsIT8* it8)
                     sign = -1;
                     NextCh(it8);
                 }
+                else
+                    if (it8->ch == '+') {
+                        sign = +1;
+                        NextCh(it8);
+                    }
 
                 it8->inum = 0;
                 it8->sy   = SINUM;
@@ -3206,7 +3211,7 @@ cmsBool ParseCube(cmsIT8* cube, cmsStage** Shaper, cmsStage** CLUT, char title[]
 
                 int nodes = lut_size * lut_size * lut_size;
 
-                cmsFloat32Number* lut_table = _cmsMalloc(cube->ContextID, nodes * 3 * sizeof(cmsFloat32Number));
+                cmsFloat32Number* lut_table = (cmsFloat32Number*) _cmsMalloc(cube->ContextID, nodes * 3 * sizeof(cmsFloat32Number));
                 if (lut_table == NULL) return FALSE;
 
                 for (i = 0; i < nodes; i++) {
diff --git a/src/java.desktop/share/native/liblcms/cmscnvrt.c b/src/java.desktop/share/native/liblcms/cmscnvrt.c
index 9f8619cb9da..c66dbcbebad 100644
--- a/src/java.desktop/share/native/liblcms/cmscnvrt.c
+++ b/src/java.desktop/share/native/liblcms/cmscnvrt.c
@@ -30,7 +30,7 @@
 //---------------------------------------------------------------------------------
 //
 //  Little Color Management System
-//  Copyright (c) 1998-2024 Marti Maria Saguer
+//  Copyright (c) 1998-2026 Marti Maria Saguer
 //
 // Permission is hereby granted, free of charge, to any person obtaining
 // a copy of this software and associated documentation files (the "Software"),
diff --git a/src/java.desktop/share/native/liblcms/cmserr.c b/src/java.desktop/share/native/liblcms/cmserr.c
index d421c550d32..877beb9ca6a 100644
--- a/src/java.desktop/share/native/liblcms/cmserr.c
+++ b/src/java.desktop/share/native/liblcms/cmserr.c
@@ -30,7 +30,7 @@
 //---------------------------------------------------------------------------------
 //
 //  Little Color Management System
-//  Copyright (c) 1998-2024 Marti Maria Saguer
+//  Copyright (c) 1998-2026 Marti Maria Saguer
 //
 // Permission is hereby granted, free of charge, to any person obtaining
 // a copy of this software and associated documentation files (the "Software"),
diff --git a/src/java.desktop/share/native/liblcms/cmsgamma.c b/src/java.desktop/share/native/liblcms/cmsgamma.c
index 773858b0c1f..bace6ab02e2 100644
--- a/src/java.desktop/share/native/liblcms/cmsgamma.c
+++ b/src/java.desktop/share/native/liblcms/cmsgamma.c
@@ -30,7 +30,7 @@
 //---------------------------------------------------------------------------------
 //
 //  Little Color Management System
-//  Copyright (c) 1998-2024 Marti Maria Saguer
+//  Copyright (c) 1998-2026 Marti Maria Saguer
 //
 // Permission is hereby granted, free of charge, to any person obtaining
 // a copy of this software and associated documentation files (the "Software"),
@@ -1187,6 +1187,7 @@ cmsBool smooth2(cmsContext ContextID, cmsFloat32Number w[], cmsFloat32Number y[]
     cmsFloat32Number *c, *d, *e;
     cmsBool st;
 
+    if (m < 4 || lambda < MATRIX_DET_TOLERANCE) return FALSE;
 
     c = (cmsFloat32Number*) _cmsCalloc(ContextID, MAX_NODES_IN_CURVE, sizeof(cmsFloat32Number));
     d = (cmsFloat32Number*) _cmsCalloc(ContextID, MAX_NODES_IN_CURVE, sizeof(cmsFloat32Number));
diff --git a/src/java.desktop/share/native/liblcms/cmsgmt.c b/src/java.desktop/share/native/liblcms/cmsgmt.c
index 03ac70202a5..1b023dcc299 100644
--- a/src/java.desktop/share/native/liblcms/cmsgmt.c
+++ b/src/java.desktop/share/native/liblcms/cmsgmt.c
@@ -30,7 +30,7 @@
 //---------------------------------------------------------------------------------
 //
 //  Little Color Management System
-//  Copyright (c) 1998-2024 Marti Maria Saguer
+//  Copyright (c) 1998-2026 Marti Maria Saguer
 //
 // Permission is hereby granted, free of charge, to any person obtaining
 // a copy of this software and associated documentation files (the "Software"),
diff --git a/src/java.desktop/share/native/liblcms/cmshalf.c b/src/java.desktop/share/native/liblcms/cmshalf.c
index 7e5f7a3c7e0..e1fb1d55488 100644
--- a/src/java.desktop/share/native/liblcms/cmshalf.c
+++ b/src/java.desktop/share/native/liblcms/cmshalf.c
@@ -30,7 +30,7 @@
 //---------------------------------------------------------------------------------
 //
 //  Little Color Management System
-//  Copyright (c) 1998-2024 Marti Maria Saguer
+//  Copyright (c) 1998-2026 Marti Maria Saguer
 //
 // Permission is hereby granted, free of charge, to any person obtaining
 // a copy of this software and associated documentation files (the "Software"),
diff --git a/src/java.desktop/share/native/liblcms/cmsintrp.c b/src/java.desktop/share/native/liblcms/cmsintrp.c
index 43c47429c3c..23e59a229a9 100644
--- a/src/java.desktop/share/native/liblcms/cmsintrp.c
+++ b/src/java.desktop/share/native/liblcms/cmsintrp.c
@@ -30,7 +30,7 @@
 //---------------------------------------------------------------------------------
 //
 //  Little Color Management System
-//  Copyright (c) 1998-2024 Marti Maria Saguer
+//  Copyright (c) 1998-2026 Marti Maria Saguer
 //
 // Permission is hereby granted, free of charge, to any person obtaining
 // a copy of this software and associated documentation files (the "Software"),
@@ -984,9 +984,9 @@ void Eval4Inputs(CMSREGISTER const cmsUInt16Number Input[],
                                 c1 = c2 = c3 = 0;
                             }
 
-        Rest = c1 * rx + c2 * ry + c3 * rz;
+        Rest = c1 * rx + c2 * ry + c3 * rz + 0x8001;
 
-        Tmp1[OutChan] = (cmsUInt16Number)(c0 + ROUND_FIXED_TO_INT(_cmsToFixedDomain(Rest)));
+        Tmp1[OutChan] = (cmsUInt16Number)c0 + ((Rest + (Rest >> 16)) >> 16);
     }
 
 
@@ -1048,9 +1048,9 @@ void Eval4Inputs(CMSREGISTER const cmsUInt16Number Input[],
                                 c1 = c2 = c3 = 0;
                             }
 
-        Rest = c1 * rx + c2 * ry + c3 * rz;
+        Rest = c1 * rx + c2 * ry + c3 * rz + 0x8001;
 
-        Tmp2[OutChan] = (cmsUInt16Number) (c0 + ROUND_FIXED_TO_INT(_cmsToFixedDomain(Rest)));
+        Tmp2[OutChan] = (cmsUInt16Number) c0 + ((Rest + (Rest >> 16)) >> 16);
     }
 
 
diff --git a/src/java.desktop/share/native/liblcms/cmsio0.c b/src/java.desktop/share/native/liblcms/cmsio0.c
index 5258b7939d2..5a4f09af5bc 100644
--- a/src/java.desktop/share/native/liblcms/cmsio0.c
+++ b/src/java.desktop/share/native/liblcms/cmsio0.c
@@ -30,7 +30,7 @@
 //---------------------------------------------------------------------------------
 //
 //  Little Color Management System
-//  Copyright (c) 1998-2024 Marti Maria Saguer
+//  Copyright (c) 1998-2026 Marti Maria Saguer
 //
 // Permission is hereby granted, free of charge, to any person obtaining
 // a copy of this software and associated documentation files (the "Software"),
@@ -685,6 +685,7 @@ void _cmsDeleteTagByPos(_cmsICCPROFILE* Icc, int i)
         // Free previous version
         if (Icc ->TagSaveAsRaw[i]) {
             _cmsFree(Icc ->ContextID, Icc ->TagPtrs[i]);
+            Icc->TagSaveAsRaw[i] = FALSE;
         }
         else {
             cmsTagTypeHandler* TypeHandler = Icc ->TagTypeHandlers[i];
@@ -1605,6 +1606,8 @@ void freeOneTag(_cmsICCPROFILE* Icc, cmsUInt32Number i)
         else
             _cmsFree(Icc->ContextID, Icc->TagPtrs[i]);
     }
+
+    Icc->TagPtrs[i] = NULL;
 }
 
 // Closes a profile freeing any involved resources
@@ -1847,8 +1850,11 @@ cmsBool CMSEXPORT cmsWriteTag(cmsHPROFILE hProfile, cmsTagSignature sig, const v
 
     if (!_cmsNewTag(Icc, sig, &i)) goto Error;
 
-    // This is not raw
-    Icc ->TagSaveAsRaw[i] = FALSE;
+    // This cannot be RAW
+    if (Icc->TagSaveAsRaw[i]) {
+        cmsSignalError(Icc->ContextID, cmsERROR_ALREADY_DEFINED, "Tag  '%x' was already saved as RAW", sig);
+        goto Error;
+    }
 
     // This is not a link
     Icc ->TagLinked[i] = (cmsTagSignature) 0;
diff --git a/src/java.desktop/share/native/liblcms/cmsio1.c b/src/java.desktop/share/native/liblcms/cmsio1.c
index 48772c7cbde..463f1192c2a 100644
--- a/src/java.desktop/share/native/liblcms/cmsio1.c
+++ b/src/java.desktop/share/native/liblcms/cmsio1.c
@@ -30,7 +30,7 @@
 //---------------------------------------------------------------------------------
 //
 //  Little Color Management System
-//  Copyright (c) 1998-2024 Marti Maria Saguer
+//  Copyright (c) 1998-2026 Marti Maria Saguer
 //
 // Permission is hereby granted, free of charge, to any person obtaining
 // a copy of this software and associated documentation files (the "Software"),
@@ -1012,7 +1012,13 @@ const cmsMLU* GetInfo(cmsHPROFILE hProfile, cmsInfoType Info)
     switch (Info) {
 
     case cmsInfoDescription:
-        sig = cmsSigProfileDescriptionTag;
+        /**
+        * Add for MacOS, which uses propiertary tags for description
+        */
+        if (cmsIsTag(hProfile, cmsSigProfileDescriptionMLTag))
+            sig = cmsSigProfileDescriptionMLTag;
+        else
+            sig = cmsSigProfileDescriptionTag;
         break;
 
     case cmsInfoManufacturer:
diff --git a/src/java.desktop/share/native/liblcms/cmslut.c b/src/java.desktop/share/native/liblcms/cmslut.c
index 3cf4e8cac5a..28220eae667 100644
--- a/src/java.desktop/share/native/liblcms/cmslut.c
+++ b/src/java.desktop/share/native/liblcms/cmslut.c
@@ -30,7 +30,7 @@
 //---------------------------------------------------------------------------------
 //
 //  Little Color Management System
-//  Copyright (c) 1998-2024 Marti Maria Saguer
+//  Copyright (c) 1998-2026 Marti Maria Saguer
 //
 // Permission is hereby granted, free of charge, to any person obtaining
 // a copy of this software and associated documentation files (the "Software"),
diff --git a/src/java.desktop/share/native/liblcms/cmsmd5.c b/src/java.desktop/share/native/liblcms/cmsmd5.c
index d9b9a4e5260..f18300ebace 100644
--- a/src/java.desktop/share/native/liblcms/cmsmd5.c
+++ b/src/java.desktop/share/native/liblcms/cmsmd5.c
@@ -30,7 +30,7 @@
 //---------------------------------------------------------------------------------
 //
 //  Little Color Management System
-//  Copyright (c) 1998-2024 Marti Maria Saguer
+//  Copyright (c) 1998-2026 Marti Maria Saguer
 //
 // Permission is hereby granted, free of charge, to any person obtaining
 // a copy of this software and associated documentation files (the "Software"),
diff --git a/src/java.desktop/share/native/liblcms/cmsmtrx.c b/src/java.desktop/share/native/liblcms/cmsmtrx.c
index 841da662a10..1db000752e3 100644
--- a/src/java.desktop/share/native/liblcms/cmsmtrx.c
+++ b/src/java.desktop/share/native/liblcms/cmsmtrx.c
@@ -30,7 +30,7 @@
 //---------------------------------------------------------------------------------
 //
 //  Little Color Management System
-//  Copyright (c) 1998-2024 Marti Maria Saguer
+//  Copyright (c) 1998-2026 Marti Maria Saguer
 //
 // Permission is hereby granted, free of charge, to any person obtaining
 // a copy of this software and associated documentation files (the "Software"),
diff --git a/src/java.desktop/share/native/liblcms/cmsnamed.c b/src/java.desktop/share/native/liblcms/cmsnamed.c
index 451bfe9f34d..acdaabc3ec2 100644
--- a/src/java.desktop/share/native/liblcms/cmsnamed.c
+++ b/src/java.desktop/share/native/liblcms/cmsnamed.c
@@ -30,7 +30,7 @@
 //---------------------------------------------------------------------------------
 //
 //  Little Color Management System
-//  Copyright (c) 1998-2024 Marti Maria Saguer
+//  Copyright (c) 1998-2026 Marti Maria Saguer
 //
 // Permission is hereby granted, free of charge, to any person obtaining
 // a copy of this software and associated documentation files (the "Software"),
@@ -303,7 +303,7 @@ cmsUInt32Number encodeUTF8(char* out, const wchar_t* in, cmsUInt32Number max_wch
     cmsUInt32Number size = 0;
     cmsUInt32Number len_w = 0;
 
-    while (*in && len_w < max_wchars)
+    while (len_w < max_wchars && *in)
     {
         if (*in >= 0xd800 && *in <= 0xdbff)
             codepoint = ((*in - 0xd800) << 10) + 0x10000;
@@ -1071,17 +1071,17 @@ cmsSEQ* CMSEXPORT cmsDupProfileSequenceDescription(const cmsSEQ* pseq)
     if (pseq == NULL)
         return NULL;
 
-    NewSeq = (cmsSEQ*) _cmsMalloc(pseq -> ContextID, sizeof(cmsSEQ));
+    NewSeq = (cmsSEQ*)_cmsMallocZero(pseq->ContextID, sizeof(cmsSEQ));
     if (NewSeq == NULL) return NULL;
 
+    NewSeq->ContextID = pseq->ContextID;
 
-    NewSeq -> seq      = (cmsPSEQDESC*) _cmsCalloc(pseq ->ContextID, pseq ->n, sizeof(cmsPSEQDESC));
-    if (NewSeq ->seq == NULL) goto Error;
+    NewSeq->seq = (cmsPSEQDESC*)_cmsCalloc(pseq->ContextID, pseq->n, sizeof(cmsPSEQDESC));
+    if (NewSeq->seq == NULL) goto Error;
 
-    NewSeq -> ContextID = pseq ->ContextID;
-    NewSeq -> n        = pseq ->n;
+    NewSeq->n = pseq->n;
 
-    for (i=0; i < pseq->n; i++) {
+    for (i = 0; i < pseq->n; i++) {
 
         memmove(&NewSeq ->seq[i].attributes, &pseq ->seq[i].attributes, sizeof(cmsUInt64Number));
 
diff --git a/src/java.desktop/share/native/liblcms/cmsopt.c b/src/java.desktop/share/native/liblcms/cmsopt.c
index 767008e68c5..9e71426a332 100644
--- a/src/java.desktop/share/native/liblcms/cmsopt.c
+++ b/src/java.desktop/share/native/liblcms/cmsopt.c
@@ -30,7 +30,7 @@
 //---------------------------------------------------------------------------------
 //
 //  Little Color Management System
-//  Copyright (c) 1998-2024 Marti Maria Saguer
+//  Copyright (c) 1998-2026 Marti Maria Saguer
 //
 // Permission is hereby granted, free of charge, to any person obtaining
 // a copy of this software and associated documentation files (the "Software"),
@@ -698,11 +698,16 @@ cmsBool OptimizeByResampling(cmsPipeline** Lut, cmsUInt32Number Intent, cmsUInt3
     if (ColorSpace == (cmsColorSpaceSignature)0 ||
         OutputColorSpace == (cmsColorSpaceSignature)0) return FALSE;
 
-    nGridPoints = _cmsReasonableGridpointsByColorspace(ColorSpace, *dwFlags);
-
     // For empty LUTs, 2 points are enough
     if (cmsPipelineStageCount(*Lut) == 0)
         nGridPoints = 2;
+    else
+    {
+        nGridPoints = _cmsReasonableGridpointsByColorspace(ColorSpace, *dwFlags);
+
+        // Lab16 as input cannot be optimized by a CLUT due to centering issues, thanks to Mike Chaney for discovering this.
+        if (!(*dwFlags & cmsFLAGS_FORCE_CLUT) && (ColorSpace == cmsSigLabData) && (T_BYTES(*InputFormat) == 2)) return FALSE;
+    }
 
     Src = *Lut;
 
@@ -813,6 +818,11 @@ Error:
             Dest ->OutputChannels,
             DataSetOut);
 
+        if (p16 == NULL) {
+            cmsPipelineFree(Dest);
+            return FALSE;
+        }
+
         _cmsPipelineSetOptimizationParameters(Dest, PrelinEval16, (void*) p16, PrelinOpt16free, Prelin16dup);
     }
 
diff --git a/src/java.desktop/share/native/liblcms/cmspack.c b/src/java.desktop/share/native/liblcms/cmspack.c
index d430e73051d..b740567af3b 100644
--- a/src/java.desktop/share/native/liblcms/cmspack.c
+++ b/src/java.desktop/share/native/liblcms/cmspack.c
@@ -30,7 +30,7 @@
 //---------------------------------------------------------------------------------
 //
 //  Little Color Management System
-//  Copyright (c) 1998-2024 Marti Maria Saguer
+//  Copyright (c) 1998-2026 Marti Maria Saguer
 //
 // Permission is hereby granted, free of charge, to any person obtaining
 // a copy of this software and associated documentation files (the "Software"),
diff --git a/src/java.desktop/share/native/liblcms/cmspcs.c b/src/java.desktop/share/native/liblcms/cmspcs.c
index 5f1b1f0d8e6..8c33057721e 100644
--- a/src/java.desktop/share/native/liblcms/cmspcs.c
+++ b/src/java.desktop/share/native/liblcms/cmspcs.c
@@ -30,7 +30,7 @@
 //---------------------------------------------------------------------------------
 //
 //  Little Color Management System
-//  Copyright (c) 1998-2024 Marti Maria Saguer
+//  Copyright (c) 1998-2026 Marti Maria Saguer
 //
 // Permission is hereby granted, free of charge, to any person obtaining
 // a copy of this software and associated documentation files (the "Software"),
diff --git a/src/java.desktop/share/native/liblcms/cmsplugin.c b/src/java.desktop/share/native/liblcms/cmsplugin.c
index aaad39f52b0..a943c9f4dd9 100644
--- a/src/java.desktop/share/native/liblcms/cmsplugin.c
+++ b/src/java.desktop/share/native/liblcms/cmsplugin.c
@@ -30,7 +30,7 @@
 //---------------------------------------------------------------------------------
 //
 //  Little Color Management System
-//  Copyright (c) 1998-2024 Marti Maria Saguer
+//  Copyright (c) 1998-2026 Marti Maria Saguer
 //
 // Permission is hereby granted, free of charge, to any person obtaining
 // a copy of this software and associated documentation files (the "Software"),
@@ -522,7 +522,7 @@ cmsBool CMSEXPORT _cmsIOPrintf(cmsIOHANDLER* io, const char* frm, ...)
     va_start(args, frm);
 
     len = vsnprintf((char*) Buffer, 2047, frm, args);
-    if (len < 0) {
+    if (len < 0 || len >= 2047) {
         va_end(args);
         return FALSE;   // Truncated, which is a fatal error for us
     }
diff --git a/src/java.desktop/share/native/liblcms/cmsps2.c b/src/java.desktop/share/native/liblcms/cmsps2.c
index 476817e9c1a..80f7c8084ae 100644
--- a/src/java.desktop/share/native/liblcms/cmsps2.c
+++ b/src/java.desktop/share/native/liblcms/cmsps2.c
@@ -30,7 +30,7 @@
 //---------------------------------------------------------------------------------
 //
 //  Little Color Management System
-//  Copyright (c) 1998-2024 Marti Maria Saguer
+//  Copyright (c) 1998-2026 Marti Maria Saguer
 //
 // Permission is hereby granted, free of charge, to any person obtaining
 // a copy of this software and associated documentation files (the "Software"),
diff --git a/src/java.desktop/share/native/liblcms/cmssamp.c b/src/java.desktop/share/native/liblcms/cmssamp.c
index ca5c4a9d693..c54a0d4ea72 100644
--- a/src/java.desktop/share/native/liblcms/cmssamp.c
+++ b/src/java.desktop/share/native/liblcms/cmssamp.c
@@ -30,7 +30,7 @@
 //---------------------------------------------------------------------------------
 //
 //  Little Color Management System
-//  Copyright (c) 1998-2024 Marti Maria Saguer
+//  Copyright (c) 1998-2026 Marti Maria Saguer
 //
 // Permission is hereby granted, free of charge, to any person obtaining
 // a copy of this software and associated documentation files (the "Software"),
@@ -152,9 +152,12 @@ cmsBool  BlackPointAsDarkerColorant(cmsHPROFILE    hInput,
     // Convert black to Lab
     cmsDoTransform(xform, Black, &Lab, 1);
 
-    // Force it to be neutral, check for inconsistencies
-    Lab.a = Lab.b = 0;
-    if (Lab.L > 50 || Lab.L < 0) Lab.L = 0;
+    if (Lab.L > 95)
+        Lab.L = 0;  // for synthetical negative profiles
+    else if (Lab.L < 0)
+        Lab.L = 0;
+    else if (Lab.L > 50)
+        Lab.L = 50;
 
     // Free the resources
     cmsDeleteTransform(xform);
@@ -352,7 +355,7 @@ cmsFloat64Number RootOfLeastSquaresFitQuadraticCurve(int n, cmsFloat64Number x[]
     if (fabs(a) < 1.0E-10) {
 
         if (fabs(b) < 1.0E-10) return 0;
-        return cmsmin(0, cmsmax(50, -c/b ));
+        return cmsmax(0, cmsmin(50, -c/b ));
     }
     else {
 
diff --git a/src/java.desktop/share/native/liblcms/cmssm.c b/src/java.desktop/share/native/liblcms/cmssm.c
index e2a810a2669..b79cd85488b 100644
--- a/src/java.desktop/share/native/liblcms/cmssm.c
+++ b/src/java.desktop/share/native/liblcms/cmssm.c
@@ -30,7 +30,7 @@
 //---------------------------------------------------------------------------------
 //
 //  Little Color Management System
-//  Copyright (c) 1998-2024 Marti Maria Saguer
+//  Copyright (c) 1998-2026 Marti Maria Saguer
 //
 // Permission is hereby granted, free of charge, to any person obtaining
 // a copy of this software and associated documentation files (the "Software"),
diff --git a/src/java.desktop/share/native/liblcms/cmstypes.c b/src/java.desktop/share/native/liblcms/cmstypes.c
index 22514f88226..eab74940cd0 100644
--- a/src/java.desktop/share/native/liblcms/cmstypes.c
+++ b/src/java.desktop/share/native/liblcms/cmstypes.c
@@ -30,7 +30,7 @@
 //---------------------------------------------------------------------------------
 //
 //  Little Color Management System
-//  Copyright (c) 1998-2024 Marti Maria Saguer
+//  Copyright (c) 1998-2026 Marti Maria Saguer
 //
 // Permission is hereby granted, free of charge, to any person obtaining
 // a copy of this software and associated documentation files (the "Software"),
@@ -4786,7 +4786,6 @@ cmsBool ReadMPEElem(struct _cms_typehandler_struct* self,
 
     return TRUE;
 
-    cmsUNUSED_PARAMETER(SizeOfTag);
     cmsUNUSED_PARAMETER(n);
 }
 
@@ -4894,9 +4893,11 @@ cmsBool Type_MPE_Write(struct _cms_typehandler_struct* self, cmsIOHANDLER* io, v
                  goto Error;
         }
 
+         Before = io ->Tell(io);
+
         if (!_cmsWriteUInt32Number(io, ElementSig)) goto Error;
         if (!_cmsWriteUInt32Number(io, 0)) goto Error;
-        Before = io ->Tell(io);
+
         if (!TypeHandler ->WritePtr(self, io, Elem, 1)) goto Error;
         if (!_cmsWriteAlignment(io)) goto Error;
 
@@ -5645,9 +5646,7 @@ void* Type_VideoSignal_Read(struct _cms_typehandler_struct* self, cmsIOHANDLER*
 {
     cmsVideoSignalType* cicp = NULL;
 
-    if (SizeOfTag != 8) return NULL;
-
-    if (!_cmsReadUInt32Number(io, NULL)) return NULL;
+    if (SizeOfTag != 4) return NULL;
 
     cicp = (cmsVideoSignalType*)_cmsCalloc(self->ContextID, 1, sizeof(cmsVideoSignalType));
     if (cicp == NULL) return NULL;
@@ -5671,7 +5670,6 @@ cmsBool Type_VideoSignal_Write(struct _cms_typehandler_struct* self, cmsIOHANDLE
 {
     cmsVideoSignalType* cicp = (cmsVideoSignalType*)Ptr;
 
-    if (!_cmsWriteUInt32Number(io, 0)) return FALSE;
     if (!_cmsWriteUInt8Number(io, cicp->ColourPrimaries)) return FALSE;
     if (!_cmsWriteUInt8Number(io, cicp->TransferCharacteristics)) return FALSE;
     if (!_cmsWriteUInt8Number(io, cicp->MatrixCoefficients)) return FALSE;
@@ -5744,11 +5742,11 @@ void Type_MHC2_Free(struct _cms_typehandler_struct* self, void* Ptr)
 
 void* Type_MHC2_Dup(struct _cms_typehandler_struct* self, const void* Ptr, cmsUInt32Number n)
 {
-    cmsMHC2Type* mhc2 = _cmsDupMem(self->ContextID, Ptr, sizeof(cmsMHC2Type));
+    cmsMHC2Type* mhc2 = (cmsMHC2Type*)_cmsDupMem(self->ContextID, Ptr, sizeof(cmsMHC2Type));
 
-    mhc2->RedCurve = _cmsDupMem(self->ContextID,   mhc2->RedCurve, mhc2->CurveEntries*sizeof(cmsFloat64Number));
-    mhc2->GreenCurve = _cmsDupMem(self->ContextID, mhc2->GreenCurve, mhc2->CurveEntries * sizeof(cmsFloat64Number));
-    mhc2->BlueCurve = _cmsDupMem(self->ContextID,  mhc2->BlueCurve, mhc2->CurveEntries * sizeof(cmsFloat64Number));
+    mhc2->RedCurve = (cmsFloat64Number*) _cmsDupMem(self->ContextID,   mhc2->RedCurve, mhc2->CurveEntries*sizeof(cmsFloat64Number));
+    mhc2->GreenCurve = (cmsFloat64Number*) _cmsDupMem(self->ContextID, mhc2->GreenCurve, mhc2->CurveEntries * sizeof(cmsFloat64Number));
+    mhc2->BlueCurve = (cmsFloat64Number*) _cmsDupMem(self->ContextID,  mhc2->BlueCurve, mhc2->CurveEntries * sizeof(cmsFloat64Number));
 
     if (mhc2->RedCurve == NULL ||
         mhc2->GreenCurve == NULL ||
@@ -5786,7 +5784,6 @@ cmsBool Type_MHC2_Write(struct _cms_typehandler_struct* self, cmsIOHANDLER* io,
     cmsUInt32Number MatrixOffset;
     cmsUInt32Number OffsetRedTable, OffsetGreenTable, OffsetBlueTable;
 
-    if (!_cmsWriteUInt32Number(io, 0)) return FALSE;
     if (!_cmsWriteUInt32Number(io, mhc2->CurveEntries)) return FALSE;
 
     if (!_cmsWrite15Fixed16Number(io, mhc2->MinLuminance)) return FALSE;
@@ -5811,10 +5808,20 @@ cmsBool Type_MHC2_Write(struct _cms_typehandler_struct* self, cmsIOHANDLER* io,
     }
 
     OffsetRedTable = io->Tell(io) - BaseOffset;
+
+    if(!_cmsWriteUInt32Number(io, cmsSigS15Fixed16ArrayType)) return FALSE;
+    if(!_cmsWriteUInt32Number(io, 0)) return FALSE;
+
     if (!WriteDoubles(io, mhc2->CurveEntries, mhc2->RedCurve)) return FALSE;
+
     OffsetGreenTable = io->Tell(io) - BaseOffset;
+    if (!_cmsWriteUInt32Number(io, cmsSigS15Fixed16ArrayType)) return FALSE;
+    if (!_cmsWriteUInt32Number(io, 0)) return FALSE;
     if (!WriteDoubles(io, mhc2->CurveEntries, mhc2->GreenCurve)) return FALSE;
+
     OffsetBlueTable = io->Tell(io) - BaseOffset;
+    if (!_cmsWriteUInt32Number(io, cmsSigS15Fixed16ArrayType)) return FALSE;
+    if (!_cmsWriteUInt32Number(io, 0)) return FALSE;
     if (!WriteDoubles(io, mhc2->CurveEntries, mhc2->BlueCurve)) return FALSE;
 
     if (!io->Seek(io, TablesOffsetPos)) return FALSE;
@@ -5858,8 +5865,6 @@ void* Type_MHC2_Read(struct _cms_typehandler_struct* self, cmsIOHANDLER* io, cms
     cmsUInt32Number MatrixOffset;
     cmsUInt32Number OffsetRedTable, OffsetGreenTable, OffsetBlueTable;
 
-    if (!_cmsReadUInt32Number(io, NULL)) return NULL;
-
     mhc2 = (cmsMHC2Type*)_cmsCalloc(self->ContextID, 1, sizeof(cmsMHC2Type));
     if (mhc2 == NULL) return NULL;
 
@@ -5890,9 +5895,10 @@ void* Type_MHC2_Read(struct _cms_typehandler_struct* self, cmsIOHANDLER* io, cms
         if (!ReadDoublesAt(io, BaseOffset + MatrixOffset, 3*4, &mhc2->XYZ2XYZmatrix[0][0])) goto Error;
     }
 
-    if (!ReadDoublesAt(io, BaseOffset + OffsetRedTable, mhc2->CurveEntries, mhc2->RedCurve)) goto Error;
-    if (!ReadDoublesAt(io, BaseOffset + OffsetGreenTable, mhc2->CurveEntries, mhc2->GreenCurve)) goto Error;
-    if (!ReadDoublesAt(io, BaseOffset + OffsetBlueTable, mhc2->CurveEntries, mhc2->BlueCurve)) goto Error;
+    // Skip sf32 tag and filler (8bytes)
+    if (!ReadDoublesAt(io, BaseOffset + OffsetRedTable + 8, mhc2->CurveEntries, mhc2->RedCurve)) goto Error;
+    if (!ReadDoublesAt(io, BaseOffset + OffsetGreenTable + 8, mhc2->CurveEntries, mhc2->GreenCurve)) goto Error;
+    if (!ReadDoublesAt(io, BaseOffset + OffsetBlueTable + 8, mhc2->CurveEntries, mhc2->BlueCurve)) goto Error;
 
     // Success
     *nItems = 1;
diff --git a/src/java.desktop/share/native/liblcms/cmsvirt.c b/src/java.desktop/share/native/liblcms/cmsvirt.c
index 1ef86dae054..0dfc6e947a5 100644
--- a/src/java.desktop/share/native/liblcms/cmsvirt.c
+++ b/src/java.desktop/share/native/liblcms/cmsvirt.c
@@ -30,7 +30,7 @@
 //---------------------------------------------------------------------------------
 //
 //  Little Color Management System
-//  Copyright (c) 1998-2024 Marti Maria Saguer
+//  Copyright (c) 1998-2026 Marti Maria Saguer
 //
 // Permission is hereby granted, free of charge, to any person obtaining
 // a copy of this software and associated documentation files (the "Software"),
@@ -400,7 +400,7 @@ int InkLimitingSampler(CMSREGISTER const cmsUInt16Number In[], CMSREGISTER cmsUI
     SumCMY   = (cmsFloat64Number) In[0]  + In[1] + In[2];
     SumCMYK  = SumCMY + In[3];
 
-    if (SumCMYK > InkLimit) {
+    if (SumCMYK > InkLimit && SumCMY > 0) {
 
         Ratio = 1 - ((SumCMYK - InkLimit) / SumCMY);
         if (Ratio < 0)
@@ -513,16 +513,20 @@ cmsHPROFILE CMSEXPORT cmsCreateLab2ProfileTHR(cmsContext ContextID, const cmsCIE
     cmsSetColorSpace(hProfile,  cmsSigLabData);
     cmsSetPCS(hProfile,         cmsSigLabData);
 
-    if (!SetTextTags(hProfile, L"Lab identity built-in")) return NULL;
+    if (!SetTextTags(hProfile, L"Lab identity built-in"))
+        goto Error;
 
     // An identity LUT is all we need
     LUT = cmsPipelineAlloc(ContextID, 3, 3);
-    if (LUT == NULL) goto Error;
+    if (LUT == NULL)
+        goto Error;
 
     if (!cmsPipelineInsertStage(LUT, cmsAT_BEGIN, _cmsStageAllocIdentityCLut(ContextID, 3)))
         goto Error;
 
-    if (!cmsWriteTag(hProfile, cmsSigAToB0Tag, LUT)) goto Error;
+    if (!cmsWriteTag(hProfile, cmsSigAToB0Tag, LUT))
+        goto Error;
+
     cmsPipelineFree(LUT);
 
     return hProfile;
@@ -550,8 +554,14 @@ cmsHPROFILE CMSEXPORT cmsCreateLab4ProfileTHR(cmsContext ContextID, const cmsCIE
 {
     cmsHPROFILE hProfile;
     cmsPipeline* LUT = NULL;
+    cmsCIEXYZ xyz;
 
-    hProfile = cmsCreateRGBProfileTHR(ContextID, WhitePoint == NULL ? cmsD50_xyY() : WhitePoint, NULL, NULL);
+    if (WhitePoint == NULL)
+        xyz = *cmsD50_XYZ();
+    else
+        cmsxyY2XYZ(&xyz, WhitePoint);
+
+    hProfile = cmsCreateRGBProfileTHR(ContextID, NULL, NULL, NULL);
     if (hProfile == NULL) return NULL;
 
     cmsSetProfileVersion(hProfile, 4.4);
@@ -560,6 +570,7 @@ cmsHPROFILE CMSEXPORT cmsCreateLab4ProfileTHR(cmsContext ContextID, const cmsCIE
     cmsSetColorSpace(hProfile,  cmsSigLabData);
     cmsSetPCS(hProfile,         cmsSigLabData);
 
+    if (!cmsWriteTag(hProfile, cmsSigMediaWhitePointTag, &xyz)) goto Error;
     if (!SetTextTags(hProfile, L"Lab identity built-in")) goto Error;
 
     // An empty LUTs is all we need
@@ -929,25 +940,24 @@ cmsHPROFILE CMSEXPORT cmsCreateBCHSWabstractProfileTHR(cmsContext ContextID,
 
     for (i=0; i < MAX_INPUT_DIMENSIONS; i++) Dimensions[i] = nLUTPoints;
     CLUT = cmsStageAllocCLut16bitGranular(ContextID, Dimensions, 3, 3, NULL);
-    if (CLUT == NULL) goto Error;
-
-
-    if (!cmsStageSampleCLut16bit(CLUT, bchswSampler, (void*) &bchsw, 0)) {
-
-        // Shouldn't reach here
+    if (CLUT == NULL)
         goto Error;
-    }
 
-    if (!cmsPipelineInsertStage(Pipeline, cmsAT_END, CLUT)) {
+    if (!cmsStageSampleCLut16bit(CLUT, bchswSampler, (void*) &bchsw, 0))
+        goto Error;
+
+    if (!cmsPipelineInsertStage(Pipeline, cmsAT_END, CLUT))
         goto Error;
-    }
 
     // Create tags
-    if (!SetTextTags(hICC, L"BCHS built-in")) return NULL;
+    if (!SetTextTags(hICC, L"BCHS built-in"))
+        goto Error;
 
-    cmsWriteTag(hICC, cmsSigMediaWhitePointTag, (void*) cmsD50_XYZ());
+    if (!cmsWriteTag(hICC, cmsSigMediaWhitePointTag, (void*)cmsD50_XYZ()))
+        goto Error;
 
-    cmsWriteTag(hICC, cmsSigAToB0Tag, (void*) Pipeline);
+    if (!cmsWriteTag(hICC, cmsSigAToB0Tag, (void*)Pipeline))
+        goto Error;
 
     // Pipeline is already on virtual profile
     cmsPipelineFree(Pipeline);
diff --git a/src/java.desktop/share/native/liblcms/cmswtpnt.c b/src/java.desktop/share/native/liblcms/cmswtpnt.c
index ebba2cd6a97..f6337765c0c 100644
--- a/src/java.desktop/share/native/liblcms/cmswtpnt.c
+++ b/src/java.desktop/share/native/liblcms/cmswtpnt.c
@@ -30,7 +30,7 @@
 //---------------------------------------------------------------------------------
 //
 //  Little Color Management System
-//  Copyright (c) 1998-2024 Marti Maria Saguer
+//  Copyright (c) 1998-2026 Marti Maria Saguer
 //
 // Permission is hereby granted, free of charge, to any person obtaining
 // a copy of this software and associated documentation files (the "Software"),
diff --git a/src/java.desktop/share/native/liblcms/cmsxform.c b/src/java.desktop/share/native/liblcms/cmsxform.c
index 1eb3eecbf18..b5dd302b973 100644
--- a/src/java.desktop/share/native/liblcms/cmsxform.c
+++ b/src/java.desktop/share/native/liblcms/cmsxform.c
@@ -30,7 +30,7 @@
 //---------------------------------------------------------------------------------
 //
 //  Little Color Management System
-//  Copyright (c) 1998-2024 Marti Maria Saguer
+//  Copyright (c) 1998-2026 Marti Maria Saguer
 //
 // Permission is hereby granted, free of charge, to any person obtaining
 // a copy of this software and associated documentation files (the "Software"),
@@ -1101,6 +1101,8 @@ cmsBool  IsProperColorSpace(cmsColorSpaceSignature Check, cmsUInt32Number dwForm
     int Space1 = (int) T_COLORSPACE(dwFormat);
     int Space2 = _cmsLCMScolorSpace(Check);
 
+    if (dwFormat == 0) return TRUE; // Bypass used by linkicc
+
     if (Space1 == PT_ANY) return (T_CHANNELS(dwFormat) == cmsChannelsOf(Check));
     if (Space1 == Space2) return TRUE;
 
@@ -1183,6 +1185,11 @@ cmsHTRANSFORM CMSEXPORT cmsCreateExtendedTransform(cmsContext ContextID,
         if (hGamutProfile == NULL) dwFlags &= ~cmsFLAGS_GAMUTCHECK;
     }
 
+    if ((dwFlags & cmsFLAGS_GAMUTCHECK) && (nGamutPCSposition <= 0 || nGamutPCSposition >= nProfiles - 1)) {
+        cmsSignalError(ContextID, cmsERROR_RANGE, "Wrong gamut PCS position '%d'", nGamutPCSposition);
+        return NULL;
+    }
+
     // On floating point transforms, inhibit cache
     if (_cmsFormatterIsFloat(InputFormat) || _cmsFormatterIsFloat(OutputFormat))
         dwFlags |= cmsFLAGS_NOCACHE;
diff --git a/src/java.desktop/share/native/liblcms/lcms2.h b/src/java.desktop/share/native/liblcms/lcms2.h
index 5ba09661308..17a52384721 100644
--- a/src/java.desktop/share/native/liblcms/lcms2.h
+++ b/src/java.desktop/share/native/liblcms/lcms2.h
@@ -30,7 +30,7 @@
 //---------------------------------------------------------------------------------
 //
 //  Little Color Management System
-//  Copyright (c) 1998-2025 Marti Maria Saguer
+//  Copyright (c) 1998-2026 Marti Maria Saguer
 //
 // Permission is hereby granted, free of charge, to any person obtaining
 // a copy of this software and associated documentation files (the "Software"),
@@ -52,7 +52,7 @@
 //
 //---------------------------------------------------------------------------------
 //
-// Version 2.17
+// Version 2.18
 //
 
 #ifndef _lcms2_H
@@ -116,7 +116,7 @@ extern "C" {
 #endif
 
 // Version/release
-#define LCMS_VERSION        2170
+#define LCMS_VERSION        2180
 
 // I will give the chance of redefining basic types for compilers that are not fully C99 compliant
 #ifndef CMS_BASIC_TYPES_ALREADY_DEFINED
diff --git a/src/java.desktop/share/native/liblcms/lcms2_internal.h b/src/java.desktop/share/native/liblcms/lcms2_internal.h
index d14c0dd823e..6bfe67e5350 100644
--- a/src/java.desktop/share/native/liblcms/lcms2_internal.h
+++ b/src/java.desktop/share/native/liblcms/lcms2_internal.h
@@ -30,7 +30,7 @@
 
 //
 //  Little Color Management System
-//  Copyright (c) 1998-2024 Marti Maria Saguer
+//  Copyright (c) 1998-2026 Marti Maria Saguer
 //
 // Permission is hereby granted, free of charge, to any person obtaining
 // a copy of this software and associated documentation files (the "Software"),
diff --git a/src/java.desktop/share/native/liblcms/lcms2_plugin.h b/src/java.desktop/share/native/liblcms/lcms2_plugin.h
index bdfc76f6bf5..85de9bc56d5 100644
--- a/src/java.desktop/share/native/liblcms/lcms2_plugin.h
+++ b/src/java.desktop/share/native/liblcms/lcms2_plugin.h
@@ -30,7 +30,7 @@
 //---------------------------------------------------------------------------------
 //
 //  Little Color Management System
-//  Copyright (c) 1998-2024 Marti Maria Saguer
+//  Copyright (c) 1998-2026 Marti Maria Saguer
 //
 // Permission is hereby granted, free of charge, to any person obtaining
 // a copy of this software and associated documentation files (the "Software"),