Security update for libpng16

Announcement ID:	SUSE-SU-2026:20030-1
Release Date:	2026-01-12T11:14:46Z
Rating:	important
References:	bsc#1254157 bsc#1254158 bsc#1254159 bsc#1254160 bsc#1254480
Cross-References:	CVE-2025-64505 CVE-2025-64506 CVE-2025-64720 CVE-2025-65018 CVE-2025-66293
CVSS scores:	CVE-2025-64505 ( SUSE ): 6.9 CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N CVE-2025-64505 ( SUSE ): 6.8 CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H CVE-2025-64505 ( NVD ): 6.1 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H CVE-2025-64506 ( SUSE ): 6.9 CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N CVE-2025-64506 ( SUSE ): 6.8 CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H CVE-2025-64506 ( NVD ): 6.1 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H CVE-2025-64720 ( SUSE ): 6.9 CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N CVE-2025-64720 ( SUSE ): 6.8 CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H CVE-2025-64720 ( NVD ): 7.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H CVE-2025-65018 ( SUSE ): 6.9 CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N CVE-2025-65018 ( SUSE ): 6.8 CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H CVE-2025-65018 ( NVD ): 7.1 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H CVE-2025-66293 ( SUSE ): 6.0 CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N CVE-2025-66293 ( SUSE ): 7.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H CVE-2025-66293 ( NVD ): 7.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H
Affected Products:	SUSE Linux Enterprise Server 16.0 SUSE Linux Enterprise Server for SAP Applications 16.0

An update that solves five vulnerabilities can now be installed.

Description:

This update for libpng16 fixes the following issues:

• CVE-2025-64505: heap buffer over-read in png_do_quantize when processing PNG files malformed palette indices (bsc#1254157).
• CVE-2025-64506: heap buffer over-read in png_write_image_8bit when processing 8-bit input with convert_to_8bit enabled (bsc#1254158).
• CVE-2025-64720: out-of-bounds read in png_image_read_composite when processing palette images with PNG_FLAG_OPTIMIZE_ALPHA enabled (bsc#1254159).
• CVE-2025-65018: heap buffer overflow in png_image_finish_read when processing specially crafted 16-bit interlaced PNGs with 8-bit output format (bsc#1254160).
• CVE-2025-66293: out-of-bounds read of the png_sRGB_base array when processing palette PNG images with partial transparency and gamma correction (bsc#1254480).

Patch Instructions:

To install this SUSE update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Alternatively you can run the command listed for your product:

• SUSE Linux Enterprise Server 16.0
  zypper in -t patch SUSE-SLES-16.0-131=1
• SUSE Linux Enterprise Server for SAP Applications 16.0
  zypper in -t patch SUSE-SLES-16.0-131=1

Package List:

• SUSE Linux Enterprise Server 16.0 (aarch64 ppc64le s390x x86_64)
  • libpng16-tools-1.6.44-160000.3.1
  • libpng16-compat-devel-1.6.44-160000.3.1
  • libpng16-tools-debuginfo-1.6.44-160000.3.1
  • libpng16-16-1.6.44-160000.3.1
  • libpng16-16-debuginfo-1.6.44-160000.3.1
  • libpng16-devel-1.6.44-160000.3.1
  • libpng16-debugsource-1.6.44-160000.3.1
• SUSE Linux Enterprise Server 16.0 (x86_64)
  • libpng16-16-x86-64-v3-1.6.44-160000.3.1
  • libpng16-compat-devel-x86-64-v3-1.6.44-160000.3.1
  • libpng16-devel-x86-64-v3-1.6.44-160000.3.1
  • libpng16-16-x86-64-v3-debuginfo-1.6.44-160000.3.1
• SUSE Linux Enterprise Server for SAP Applications 16.0 (ppc64le x86_64)
  • libpng16-tools-1.6.44-160000.3.1
  • libpng16-compat-devel-1.6.44-160000.3.1
  • libpng16-tools-debuginfo-1.6.44-160000.3.1
  • libpng16-16-1.6.44-160000.3.1
  • libpng16-16-debuginfo-1.6.44-160000.3.1
  • libpng16-devel-1.6.44-160000.3.1
  • libpng16-debugsource-1.6.44-160000.3.1
• SUSE Linux Enterprise Server for SAP Applications 16.0 (x86_64)
  • libpng16-16-x86-64-v3-1.6.44-160000.3.1
  • libpng16-compat-devel-x86-64-v3-1.6.44-160000.3.1
  • libpng16-devel-x86-64-v3-1.6.44-160000.3.1
  • libpng16-16-x86-64-v3-debuginfo-1.6.44-160000.3.1

References:

• https://www.suse.com/security/cve/CVE-2025-64505.html
• https://www.suse.com/security/cve/CVE-2025-64506.html
• https://www.suse.com/security/cve/CVE-2025-64720.html
• https://www.suse.com/security/cve/CVE-2025-65018.html
• https://www.suse.com/security/cve/CVE-2025-66293.html
• https://bugzilla.suse.com/show_bug.cgi?id=1254157
• https://bugzilla.suse.com/show_bug.cgi?id=1254158
• https://bugzilla.suse.com/show_bug.cgi?id=1254159
• https://bugzilla.suse.com/show_bug.cgi?id=1254160
• https://bugzilla.suse.com/show_bug.cgi?id=1254480