Security update for libpng16

Announcement ID:	SUSE-SU-2026:0596-1
Release Date:	2026-02-23T15:57:59Z
Rating:	important
References:	bsc#1256525 bsc#1256526 bsc#1257364 bsc#1257365 bsc#1258020
Cross-References:	CVE-2025-28162 CVE-2025-28164 CVE-2026-22695 CVE-2026-22801 CVE-2026-25646
CVSS scores:	CVE-2025-28162 ( SUSE ): 4.8 CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N CVE-2025-28162 ( SUSE ): 3.3 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L CVE-2025-28162 ( NVD ): 5.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H CVE-2025-28164 ( SUSE ): 4.8 CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N CVE-2025-28164 ( SUSE ): 3.3 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L CVE-2025-28164 ( NVD ): 5.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H CVE-2026-22695 ( SUSE ): 6.8 CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N CVE-2026-22695 ( SUSE ): 6.1 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H CVE-2026-22695 ( NVD ): 7.1 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H CVE-2026-22695 ( NVD ): 6.1 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H CVE-2026-22801 ( SUSE ): 7.0 CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N CVE-2026-22801 ( SUSE ): 6.8 CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H CVE-2026-22801 ( NVD ): 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H CVE-2026-22801 ( NVD ): 6.8 CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H CVE-2026-25646 ( SUSE ): 8.3 CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:L/VI:L/VA:H/SC:N/SI:N/SA:N CVE-2026-25646 ( SUSE ): 7.0 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:H CVE-2026-25646 ( NVD ): 8.3 CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:L/VI:L/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X CVE-2026-25646 ( NVD ): 8.1 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Affected Products:	SUSE Linux Enterprise High Performance Computing 15 SP4 SUSE Linux Enterprise High Performance Computing 15 SP5 SUSE Linux Enterprise High Performance Computing ESPOS 15 SP4 SUSE Linux Enterprise High Performance Computing ESPOS 15 SP5 SUSE Linux Enterprise High Performance Computing LTSS 15 SP4 SUSE Linux Enterprise High Performance Computing LTSS 15 SP5 SUSE Linux Enterprise Micro 5.2 SUSE Linux Enterprise Micro 5.3 SUSE Linux Enterprise Micro 5.4 SUSE Linux Enterprise Micro 5.5 SUSE Linux Enterprise Micro for Rancher 5.2 SUSE Linux Enterprise Micro for Rancher 5.3 SUSE Linux Enterprise Micro for Rancher 5.4 SUSE Linux Enterprise Server 15 SP4 SUSE Linux Enterprise Server 15 SP4 LTSS SUSE Linux Enterprise Server 15 SP5 SUSE Linux Enterprise Server 15 SP5 LTSS SUSE Linux Enterprise Server for SAP Applications 15 SP4 SUSE Linux Enterprise Server for SAP Applications 15 SP5

An update that solves five vulnerabilities can now be installed.

Description:

This update for libpng16 fixes the following issues:

• CVE-2025-28162: memory leaks when running pngimage (bsc#1257364).
• CVE-2025-28164: memory leaks when running pngimage (bsc#1257365).
• CVE-2026-22695: heap buffer over-read in png_image_finish_read (bsc#1256525).
• CVE-2026-22801: integer truncation causing heap buffer over-read in png_image_write_* (bsc#1256526).
• CVE-2026-25646: heap buffer overflow vulnerability in png_set_dither/png_set_quantize (bsc#1258020).

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 Micro 5.5
  zypper in -t patch SUSE-SLE-Micro-5.5-2026-596=1
• SUSE Linux Enterprise High Performance Computing ESPOS 15 SP4
  zypper in -t patch SUSE-SLE-Product-HPC-15-SP4-ESPOS-2026-596=1
• SUSE Linux Enterprise High Performance Computing LTSS 15 SP4
  zypper in -t patch SUSE-SLE-Product-HPC-15-SP4-LTSS-2026-596=1
• SUSE Linux Enterprise High Performance Computing ESPOS 15 SP5
  zypper in -t patch SUSE-SLE-Product-HPC-15-SP5-ESPOS-2026-596=1
• SUSE Linux Enterprise High Performance Computing LTSS 15 SP5
  zypper in -t patch SUSE-SLE-Product-HPC-15-SP5-LTSS-2026-596=1
• SUSE Linux Enterprise Server 15 SP4 LTSS
  zypper in -t patch SUSE-SLE-Product-SLES-15-SP4-LTSS-2026-596=1
• SUSE Linux Enterprise Server 15 SP5 LTSS
  zypper in -t patch SUSE-SLE-Product-SLES-15-SP5-LTSS-2026-596=1
• SUSE Linux Enterprise Server for SAP Applications 15 SP4
  zypper in -t patch SUSE-SLE-Product-SLES_SAP-15-SP4-2026-596=1
• SUSE Linux Enterprise Server for SAP Applications 15 SP5
  zypper in -t patch SUSE-SLE-Product-SLES_SAP-15-SP5-2026-596=1
• SUSE Linux Enterprise Micro 5.2
  zypper in -t patch SUSE-SUSE-MicroOS-5.2-2026-596=1
• SUSE Linux Enterprise Micro for Rancher 5.2
  zypper in -t patch SUSE-SUSE-MicroOS-5.2-2026-596=1
• SUSE Linux Enterprise Micro for Rancher 5.3
  zypper in -t patch SUSE-SLE-Micro-5.3-2026-596=1
• SUSE Linux Enterprise Micro 5.3
  zypper in -t patch SUSE-SLE-Micro-5.3-2026-596=1
• SUSE Linux Enterprise Micro for Rancher 5.4
  zypper in -t patch SUSE-SLE-Micro-5.4-2026-596=1
• SUSE Linux Enterprise Micro 5.4
  zypper in -t patch SUSE-SLE-Micro-5.4-2026-596=1

Package List:

• SUSE Linux Enterprise Micro 5.5 (aarch64 ppc64le s390x x86_64)
  • libpng16-16-debuginfo-1.6.34-150000.3.19.1
  • libpng16-debugsource-1.6.34-150000.3.19.1
  • libpng16-16-1.6.34-150000.3.19.1
• SUSE Linux Enterprise High Performance Computing ESPOS 15 SP4 (aarch64 x86_64)
  • libpng16-debugsource-1.6.34-150000.3.19.1
  • libpng16-16-1.6.34-150000.3.19.1
  • libpng16-16-debuginfo-1.6.34-150000.3.19.1
  • libpng16-devel-1.6.34-150000.3.19.1
  • libpng16-compat-devel-1.6.34-150000.3.19.1
• SUSE Linux Enterprise High Performance Computing ESPOS 15 SP4 (x86_64)
  • libpng16-16-32bit-1.6.34-150000.3.19.1
  • libpng16-16-32bit-debuginfo-1.6.34-150000.3.19.1
• SUSE Linux Enterprise High Performance Computing LTSS 15 SP4 (aarch64 x86_64)
  • libpng16-debugsource-1.6.34-150000.3.19.1
  • libpng16-16-1.6.34-150000.3.19.1
  • libpng16-16-debuginfo-1.6.34-150000.3.19.1
  • libpng16-devel-1.6.34-150000.3.19.1
  • libpng16-compat-devel-1.6.34-150000.3.19.1
• SUSE Linux Enterprise High Performance Computing LTSS 15 SP4 (x86_64)
  • libpng16-16-32bit-1.6.34-150000.3.19.1
  • libpng16-16-32bit-debuginfo-1.6.34-150000.3.19.1
• SUSE Linux Enterprise High Performance Computing ESPOS 15 SP5 (aarch64 x86_64)
  • libpng16-debugsource-1.6.34-150000.3.19.1
  • libpng16-16-1.6.34-150000.3.19.1
  • libpng16-16-debuginfo-1.6.34-150000.3.19.1
  • libpng16-devel-1.6.34-150000.3.19.1
  • libpng16-compat-devel-1.6.34-150000.3.19.1
• SUSE Linux Enterprise High Performance Computing ESPOS 15 SP5 (x86_64)
  • libpng16-16-32bit-1.6.34-150000.3.19.1
  • libpng16-16-32bit-debuginfo-1.6.34-150000.3.19.1
• SUSE Linux Enterprise High Performance Computing LTSS 15 SP5 (aarch64 x86_64)
  • libpng16-debugsource-1.6.34-150000.3.19.1
  • libpng16-16-1.6.34-150000.3.19.1
  • libpng16-16-debuginfo-1.6.34-150000.3.19.1
  • libpng16-devel-1.6.34-150000.3.19.1
  • libpng16-compat-devel-1.6.34-150000.3.19.1
• SUSE Linux Enterprise High Performance Computing LTSS 15 SP5 (x86_64)
  • libpng16-16-32bit-1.6.34-150000.3.19.1
  • libpng16-16-32bit-debuginfo-1.6.34-150000.3.19.1
• SUSE Linux Enterprise Server 15 SP4 LTSS (aarch64 ppc64le s390x x86_64)
  • libpng16-debugsource-1.6.34-150000.3.19.1
  • libpng16-16-1.6.34-150000.3.19.1
  • libpng16-16-debuginfo-1.6.34-150000.3.19.1
  • libpng16-devel-1.6.34-150000.3.19.1
  • libpng16-compat-devel-1.6.34-150000.3.19.1
• SUSE Linux Enterprise Server 15 SP4 LTSS (x86_64)
  • libpng16-16-32bit-1.6.34-150000.3.19.1
  • libpng16-16-32bit-debuginfo-1.6.34-150000.3.19.1
• SUSE Linux Enterprise Server 15 SP5 LTSS (aarch64 ppc64le s390x x86_64)
  • libpng16-debugsource-1.6.34-150000.3.19.1
  • libpng16-16-1.6.34-150000.3.19.1
  • libpng16-16-debuginfo-1.6.34-150000.3.19.1
  • libpng16-devel-1.6.34-150000.3.19.1
  • libpng16-compat-devel-1.6.34-150000.3.19.1
• SUSE Linux Enterprise Server 15 SP5 LTSS (x86_64)
  • libpng16-16-32bit-1.6.34-150000.3.19.1
  • libpng16-16-32bit-debuginfo-1.6.34-150000.3.19.1
• SUSE Linux Enterprise Server for SAP Applications 15 SP4 (ppc64le x86_64)
  • libpng16-debugsource-1.6.34-150000.3.19.1
  • libpng16-16-1.6.34-150000.3.19.1
  • libpng16-16-debuginfo-1.6.34-150000.3.19.1
  • libpng16-devel-1.6.34-150000.3.19.1
  • libpng16-compat-devel-1.6.34-150000.3.19.1
• SUSE Linux Enterprise Server for SAP Applications 15 SP4 (x86_64)
  • libpng16-16-32bit-1.6.34-150000.3.19.1
  • libpng16-16-32bit-debuginfo-1.6.34-150000.3.19.1
• SUSE Linux Enterprise Server for SAP Applications 15 SP5 (ppc64le x86_64)
  • libpng16-debugsource-1.6.34-150000.3.19.1
  • libpng16-16-1.6.34-150000.3.19.1
  • libpng16-16-debuginfo-1.6.34-150000.3.19.1
  • libpng16-devel-1.6.34-150000.3.19.1
  • libpng16-compat-devel-1.6.34-150000.3.19.1
• SUSE Linux Enterprise Server for SAP Applications 15 SP5 (x86_64)
  • libpng16-16-32bit-1.6.34-150000.3.19.1
  • libpng16-16-32bit-debuginfo-1.6.34-150000.3.19.1
• SUSE Linux Enterprise Micro 5.2 (aarch64 s390x x86_64)
  • libpng16-16-debuginfo-1.6.34-150000.3.19.1
  • libpng16-debugsource-1.6.34-150000.3.19.1
  • libpng16-16-1.6.34-150000.3.19.1
• SUSE Linux Enterprise Micro for Rancher 5.2 (aarch64 s390x x86_64)
  • libpng16-16-debuginfo-1.6.34-150000.3.19.1
  • libpng16-debugsource-1.6.34-150000.3.19.1
  • libpng16-16-1.6.34-150000.3.19.1
• SUSE Linux Enterprise Micro for Rancher 5.3 (aarch64 s390x x86_64)
  • libpng16-16-debuginfo-1.6.34-150000.3.19.1
  • libpng16-debugsource-1.6.34-150000.3.19.1
  • libpng16-16-1.6.34-150000.3.19.1
• SUSE Linux Enterprise Micro 5.3 (aarch64 s390x x86_64)
  • libpng16-16-debuginfo-1.6.34-150000.3.19.1
  • libpng16-debugsource-1.6.34-150000.3.19.1
  • libpng16-16-1.6.34-150000.3.19.1
• SUSE Linux Enterprise Micro for Rancher 5.4 (aarch64 s390x x86_64)
  • libpng16-16-debuginfo-1.6.34-150000.3.19.1
  • libpng16-debugsource-1.6.34-150000.3.19.1
  • libpng16-16-1.6.34-150000.3.19.1
• SUSE Linux Enterprise Micro 5.4 (aarch64 s390x x86_64)
  • libpng16-16-debuginfo-1.6.34-150000.3.19.1
  • libpng16-debugsource-1.6.34-150000.3.19.1
  • libpng16-16-1.6.34-150000.3.19.1

References:

• https://www.suse.com/security/cve/CVE-2025-28162.html
• https://www.suse.com/security/cve/CVE-2025-28164.html
• https://www.suse.com/security/cve/CVE-2026-22695.html
• https://www.suse.com/security/cve/CVE-2026-22801.html
• https://www.suse.com/security/cve/CVE-2026-25646.html
• https://bugzilla.suse.com/show_bug.cgi?id=1256525
• https://bugzilla.suse.com/show_bug.cgi?id=1256526
• https://bugzilla.suse.com/show_bug.cgi?id=1257364
• https://bugzilla.suse.com/show_bug.cgi?id=1257365
• https://bugzilla.suse.com/show_bug.cgi?id=1258020