Release libpng version 1.6.55

ctruta · ctruta · commit c3e304954a9c · 2026-02-09T22:02:20.000+02:00
diff --git a/ANNOUNCE b/ANNOUNCE
@@ -1,12 +1,4 @@
-libpng 1.6.55.git
-=================
-
-This is a development version, not intended to be a public release.
-It will be replaced by a public release, or by another development
-version, at a later time.
-
-
-libpng 1.6.54 - January 12, 2026
+libpng 1.6.55 - February 9, 2026
 ================================
 
 This is a public release of libpng, intended for use in production code.
@@ -17,10 +9,10 @@ Files available for download
 
 Source files:
 
- * libpng-1.6.54.tar.xz (LZMA-compressed, recommended)
- * libpng-1.6.54.tar.gz (deflate-compressed)
- * lpng1654.7z (LZMA-compressed)
- * lpng1654.zip (deflate-compressed)
+ * libpng-1.6.55.tar.xz (LZMA-compressed, recommended)
+ * libpng-1.6.55.tar.gz (deflate-compressed)
+ * lpng1655.7z (LZMA-compressed)
+ * lpng1655.zip (deflate-compressed)
 
 Other information:
 
@@ -30,15 +22,13 @@ Other information:
  * TRADEMARK.md
 
 
-Changes from version 1.6.53 to version 1.6.54
+Changes from version 1.6.54 to version 1.6.55
 ---------------------------------------------
 
- * Fixed CVE-2026-22695 (medium severity):
-   Heap buffer over-read in `png_image_read_direct_scaled`.
-   (Reported and fixed by Petr Simecek.)
- * Fixed CVE-2026-22801 (medium severity):
-   Integer truncation causing heap buffer over-read in `png_image_write_*`.
- * Implemented various improvements in oss-fuzz.
+ * Fixed CVE-2026-25646 (high severity):
+   Heap buffer overflow in `png_set_quantize`.
+   (Reported and fixed by Joshua Inscoe.)
+ * Resolved an oss-fuzz build issue involving nalloc.
    (Contributed by Philippe Antoine.)
 
 Send comments/corrections/commendations to png-mng-implement at lists.sf.net.
diff --git a/CHANGES b/CHANGES
@@ -6330,7 +6330,12 @@ Version 1.6.54 [January 12, 2026]
   Implemented various improvements in oss-fuzz.
     (Contributed by Philippe Antoine.)
 
-Version 1.6.55 [TODO]
+Version 1.6.55 [February 9, 2026]
+  Fixed CVE-2026-25646 (high severity):
+    Heap buffer overflow in `png_set_quantize`.
+    (Reported and fixed by Joshua Inscoe.)
+  Resolved an oss-fuzz build issue involving nalloc.
+    (Contributed by Philippe Antoine.)
 
 Send comments/corrections/commendations to png-mng-implement at lists.sf.net.
 Subscription is required; visit
diff --git a/CMakeLists.txt b/CMakeLists.txt
@@ -19,8 +19,8 @@ cmake_minimum_required(VERSION 3.14...4.2)
 set(PNGLIB_MAJOR 1)
 set(PNGLIB_MINOR 6)
 set(PNGLIB_REVISION 55)
-#set(PNGLIB_SUBREVISION 0)
-set(PNGLIB_SUBREVISION "git")
+set(PNGLIB_SUBREVISION 0)
+#set(PNGLIB_SUBREVISION "git")
 set(PNGLIB_VERSION ${PNGLIB_MAJOR}.${PNGLIB_MINOR}.${PNGLIB_REVISION})
 set(PNGLIB_ABI_VERSION ${PNGLIB_MAJOR}${PNGLIB_MINOR})
 set(PNGLIB_SHARED_VERSION ${PNGLIB_ABI_VERSION}.${PNGLIB_REVISION}.${PNGLIB_SUBREVISION})
diff --git a/README b/README
@@ -1,5 +1,5 @@
-README for libpng version 1.6.55.git
-====================================
+README for libpng version 1.6.55
+================================
 
 See the note about version numbers near the top of `png.h`.
 See `INSTALL` for instructions on how to install libpng.
diff --git a/configure b/configure
@@ -1,6 +1,6 @@
 #! /bin/sh
 # Guess values for system-dependent variables and create Makefiles.
-# Generated by GNU Autoconf 2.72 for libpng 1.6.55.git.
+# Generated by GNU Autoconf 2.72 for libpng 1.6.55.
 #
 # Report bugs to <png-mng-implement@lists.sourceforge.net>.
 #
@@ -614,8 +614,8 @@ MAKEFLAGS=
 # Identity of this package.
 PACKAGE_NAME='libpng'
 PACKAGE_TARNAME='libpng'
-PACKAGE_VERSION='1.6.55.git'
-PACKAGE_STRING='libpng 1.6.55.git'
+PACKAGE_VERSION='1.6.55'
+PACKAGE_STRING='libpng 1.6.55'
 PACKAGE_BUGREPORT='png-mng-implement@lists.sourceforge.net'
 PACKAGE_URL=''
 
@@ -1424,7 +1424,7 @@ if test "$ac_init_help" = "long"; then
   # Omit some internal or obsolete options to make the list less imposing.
   # This message is too long to be a string in the A/UX 3.1 sh.
   cat <<_ACEOF
-'configure' configures libpng 1.6.55.git to adapt to many kinds of systems.
+'configure' configures libpng 1.6.55 to adapt to many kinds of systems.
 
 Usage: $0 [OPTION]... [VAR=VALUE]...
 
@@ -1495,7 +1495,7 @@ fi
 
 if test -n "$ac_init_help"; then
   case $ac_init_help in
-     short | recursive ) echo "Configuration of libpng 1.6.55.git:";;
+     short | recursive ) echo "Configuration of libpng 1.6.55:";;
    esac
   cat <<\_ACEOF
 
@@ -1698,7 +1698,7 @@ fi
 test -n "$ac_init_help" && exit $ac_status
 if $ac_init_version; then
   cat <<\_ACEOF
-libpng configure 1.6.55.git
+libpng configure 1.6.55
 generated by GNU Autoconf 2.72
 
 Copyright (C) 2023 Free Software Foundation, Inc.
@@ -1961,7 +1961,7 @@ cat >config.log <<_ACEOF
 This file contains any messages produced by compilers while
 running configure, to aid debugging if configure makes a mistake.
 
-It was created by libpng $as_me 1.6.55.git, which was
+It was created by libpng $as_me 1.6.55, which was
 generated by GNU Autoconf 2.72.  Invocation command line was
 
   $ $0$ac_configure_args_raw
@@ -3446,7 +3446,7 @@ fi
 
 # Define the identity of the package.
  PACKAGE='libpng'
- VERSION='1.6.55.git'
+ VERSION='1.6.55'
 
 
 printf "%s\n" "#define PACKAGE \"$PACKAGE\"" >>confdefs.h
@@ -3665,7 +3665,7 @@ fi
 
 
 
-PNGLIB_VERSION=1.6.55.git
+PNGLIB_VERSION=1.6.55
 PNGLIB_MAJOR=1
 PNGLIB_MINOR=6
 PNGLIB_RELEASE=55
@@ -16406,7 +16406,7 @@ cat >>$CONFIG_STATUS <<\_ACEOF || ac_write_fail=1
 # report actual input values of CONFIG_FILES etc. instead of their
 # values after options handling.
 ac_log="
-This file was extended by libpng $as_me 1.6.55.git, which was
+This file was extended by libpng $as_me 1.6.55, which was
 generated by GNU Autoconf 2.72.  Invocation command line was
 
   CONFIG_FILES    = $CONFIG_FILES
@@ -16474,7 +16474,7 @@ ac_cs_config_escaped=`printf "%s\n" "$ac_cs_config" | sed "s/^ //; s/'/'\\\\\\\\
 cat >>$CONFIG_STATUS <<_ACEOF || ac_write_fail=1
 ac_cs_config='$ac_cs_config_escaped'
 ac_cs_version="\\
-libpng config.status 1.6.55.git
+libpng config.status 1.6.55
 configured by $0, generated by GNU Autoconf 2.72,
   with options \\"\$ac_cs_config\\"
 
diff --git a/configure.ac b/configure.ac
@@ -25,7 +25,7 @@ AC_PREREQ([2.68])
 
 dnl Version number stuff here:
 
-AC_INIT([libpng],[1.6.55.git],[png-mng-implement@lists.sourceforge.net])
+AC_INIT([libpng],[1.6.55],[png-mng-implement@lists.sourceforge.net])
 AC_CONFIG_MACRO_DIR([scripts/autoconf])
 
 # libpng does not follow GNU file name conventions (hence 'foreign')
@@ -46,7 +46,7 @@ dnl automake, so the following is not necessary (and is not defined anyway):
 dnl AM_PREREQ([1.11.2])
 dnl stop configure from automagically running automake
 
-PNGLIB_VERSION=1.6.55.git
+PNGLIB_VERSION=1.6.55
 PNGLIB_MAJOR=1
 PNGLIB_MINOR=6
 PNGLIB_RELEASE=55
diff --git a/libpng-manual.txt b/libpng-manual.txt
@@ -1,6 +1,6 @@
 libpng-manual.txt - A description on how to use and modify libpng
 
- Copyright (c) 2018-2025 Cosmin Truta
+ Copyright (c) 2018-2026 Cosmin Truta
  Copyright (c) 1998-2018 Glenn Randers-Pehrson
 
  This document is released under the libpng license.
@@ -9,7 +9,7 @@ libpng-manual.txt - A description on how to use and modify libpng
 
  Based on:
 
- libpng version 1.6.36, December 2018, through 1.6.54 - January 2026
+ libpng version 1.6.36, December 2018, through 1.6.55 - February 2026
  Updated and distributed by Cosmin Truta
  Copyright (c) 2018-2026 Cosmin Truta
 
diff --git a/libpng.3 b/libpng.3
@@ -1,6 +1,6 @@
-.TH LIBPNG 3 "January 12, 2026"
+.TH LIBPNG 3 "February 9, 2026"
 .SH NAME
-libpng \- Portable Network Graphics (PNG) Reference Library 1.6.54
+libpng \- Portable Network Graphics (PNG) Reference Library 1.6.55
 
 .SH SYNOPSIS
 \fB#include <png.h>\fP
@@ -519,7 +519,7 @@ Following is a copy of the libpng-manual.txt file that accompanies libpng.
 .SH LIBPNG.TXT
 libpng-manual.txt - A description on how to use and modify libpng
 
- Copyright (c) 2018-2025 Cosmin Truta
+ Copyright (c) 2018-2026 Cosmin Truta
  Copyright (c) 1998-2018 Glenn Randers-Pehrson
 
  This document is released under the libpng license.
@@ -528,7 +528,7 @@ libpng-manual.txt - A description on how to use and modify libpng
 
  Based on:
 
- libpng version 1.6.36, December 2018, through 1.6.54 - January 2026
+ libpng version 1.6.36, December 2018, through 1.6.55 - February 2026
  Updated and distributed by Cosmin Truta
  Copyright (c) 2018-2026 Cosmin Truta
 
diff --git a/libpngpf.3 b/libpngpf.3
@@ -1,6 +1,6 @@
-.TH LIBPNGPF 3 "January 12, 2026"
+.TH LIBPNGPF 3 "February 9, 2026"
 .SH NAME
-libpng \- Portable Network Graphics (PNG) Reference Library 1.6.54
+libpng \- Portable Network Graphics (PNG) Reference Library 1.6.55
 
 .SH SYNOPSIS
 \fB#include "pngpriv.h"\fP
diff --git a/png.5 b/png.5
@@ -1,4 +1,4 @@
-.TH PNG 5 "January 12, 2026"
+.TH PNG 5 "February 9, 2026"
 .SH NAME
 png \- Portable Network Graphics (PNG) format
 
diff --git a/png.c b/png.c
@@ -13,7 +13,7 @@
 #include "pngpriv.h"
 
 /* Generate a compiler error if there is an old png.h in the search path. */
-typedef png_libpng_version_1_6_55_git Your_png_h_is_not_version_1_6_55_git;
+typedef png_libpng_version_1_6_55 Your_png_h_is_not_version_1_6_55;
 
 /* Sanity check the chunks definitions - PNG_KNOWN_CHUNKS from pngpriv.h and the
  * corresponding macro definitions.  This causes a compile time failure if
@@ -820,7 +820,7 @@ png_get_copyright(png_const_structrp png_ptr)
    return PNG_STRING_COPYRIGHT
 #else
    return PNG_STRING_NEWLINE \
-      "libpng version 1.6.55.git" PNG_STRING_NEWLINE \
+      "libpng version 1.6.55" PNG_STRING_NEWLINE \
       "Copyright (c) 2018-2026 Cosmin Truta" PNG_STRING_NEWLINE \
       "Copyright (c) 1998-2002,2004,2006-2018 Glenn Randers-Pehrson" \
       PNG_STRING_NEWLINE \
diff --git a/png.h b/png.h
@@ -1,6 +1,6 @@
 /* png.h - header file for PNG reference library
  *
- * libpng version 1.6.55.git
+ * libpng version 1.6.55
  *
  * Copyright (c) 2018-2026 Cosmin Truta
  * Copyright (c) 1998-2002,2004,2006-2018 Glenn Randers-Pehrson
@@ -14,7 +14,7 @@
  *   libpng versions 0.89, June 1996, through 0.96, May 1997: Andreas Dilger
  *   libpng versions 0.97, January 1998, through 1.6.35, July 2018:
  *     Glenn Randers-Pehrson
- *   libpng versions 1.6.36, December 2018, through 1.6.54, January 2026:
+ *   libpng versions 1.6.36, December 2018, through 1.6.55, February 2026:
  *     Cosmin Truta
  *   See also "Contributing Authors", below.
  */
@@ -238,7 +238,7 @@
  *    ...
  *    1.5.30                  15    10530  15.so.15.30[.0]
  *    ...
- *    1.6.54                  16    10654  16.so.16.54[.0]
+ *    1.6.55                  16    10655  16.so.16.55[.0]
  *
  *    Henceforth the source version will match the shared-library major and
  *    minor numbers; the shared-library major version number will be used for
@@ -274,7 +274,7 @@
  */
 
 /* Version information for png.h - this should match the version in png.c */
-#define PNG_LIBPNG_VER_STRING "1.6.55.git"
+#define PNG_LIBPNG_VER_STRING "1.6.55"
 #define PNG_HEADER_VERSION_STRING " libpng version " PNG_LIBPNG_VER_STRING "\n"
 
 /* The versions of shared library builds should stay in sync, going forward */
@@ -290,7 +290,7 @@
 /* This should be zero for a public release, or non-zero for a
  * development version.
  */
-#define PNG_LIBPNG_VER_BUILD 1
+#define PNG_LIBPNG_VER_BUILD 0
 
 /* Release Status */
 #define PNG_LIBPNG_BUILD_ALPHA               1
@@ -307,7 +307,7 @@
 #define PNG_LIBPNG_BUILD_SPECIAL 32 /* Cannot be OR'ed with
                                        PNG_LIBPNG_BUILD_PRIVATE */
 
-#define PNG_LIBPNG_BUILD_BASE_TYPE PNG_LIBPNG_BUILD_BETA
+#define PNG_LIBPNG_BUILD_BASE_TYPE PNG_LIBPNG_BUILD_STABLE
 
 /* Careful here.  At one time, Guy wanted to use 082, but that
  * would be octal.  We must not include leading zeros.
@@ -316,7 +316,7 @@
  * From version 1.0.1 it is:
  * XXYYZZ, where XX=major, YY=minor, ZZ=release
  */
-#define PNG_LIBPNG_VER 10655 /* 1.6.55.git */
+#define PNG_LIBPNG_VER 10655 /* 1.6.55 */
 
 /* Library configuration: these options cannot be changed after
  * the library has been built.
@@ -426,7 +426,7 @@ extern "C" {
 /* This triggers a compiler error in png.c, if png.c and png.h
  * do not agree upon the version number.
  */
-typedef char *png_libpng_version_1_6_55_git;
+typedef char *png_libpng_version_1_6_55;
 
 /* Basic control structions.  Read libpng-manual.txt or libpng.3 for more info.
  *
diff --git a/pngconf.h b/pngconf.h
@@ -1,6 +1,6 @@
 /* pngconf.h - machine-configurable file for libpng
  *
- * libpng version 1.6.55.git
+ * libpng version 1.6.55
  *
  * Copyright (c) 2018-2026 Cosmin Truta
  * Copyright (c) 1998-2002,2004,2006-2016,2018 Glenn Randers-Pehrson
diff --git a/pngtest.c b/pngtest.c
@@ -50,7 +50,7 @@
 #define STDERR stdout
 
 /* Generate a compiler error if there is an old png.h in the search path. */
-typedef png_libpng_version_1_6_55_git Your_png_h_is_not_version_1_6_55_git;
+typedef png_libpng_version_1_6_55 Your_png_h_is_not_version_1_6_55;
 
 /* Ensure that all version numbers in png.h are consistent with one another. */
 #if (PNG_LIBPNG_VER != PNG_LIBPNG_VER_MAJOR * 10000 + \
diff --git a/scripts/libpng-config-head.in b/scripts/libpng-config-head.in
@@ -11,7 +11,7 @@
 
 # Modeled after libxml-config.
 
-version=1.6.55.git
+version=1.6.55
 prefix=""
 libdir=""
 libs=""
diff --git a/scripts/libpng.pc.in b/scripts/libpng.pc.in
@@ -5,6 +5,6 @@ includedir=@includedir@/libpng16
 
 Name: libpng
 Description: Loads and saves PNG files
-Version: 1.6.55.git
+Version: 1.6.55
 Libs: -L${libdir} -lpng16
 Cflags: -I${includedir}
diff --git a/scripts/pnglibconf.h.prebuilt b/scripts/pnglibconf.h.prebuilt
@@ -1,6 +1,6 @@
 /* pnglibconf.h - library build configuration */
 
-/* libpng version 1.6.55.git */
+/* libpng version 1.6.55 */
 
 /* Copyright (c) 2018-2026 Cosmin Truta */
 /* Copyright (c) 1998-2002,2004,2006-2018 Glenn Randers-Pehrson */

Original file line number	Diff line number	Diff line change
`@@ -1,4 +1,4 @@`
`1`		`-.TH PNG 5 "January 12, 2026"`
	`1`	`+.TH PNG 5 "February 9, 2026"`
`2`	`2`	`.SH NAME`
`3`	`3`	`png \- Portable Network Graphics (PNG) format`
`4`	`4`