Security update for libpng16

Announcement ID:	SUSE-SU-2026:2057-1
Release Date:	2026-05-25T14:04:25Z
Rating:	moderate
References:	bsc#1261957
Cross-References:	CVE-2026-34757
CVSS scores:	CVE-2026-34757 ( SUSE ): 5.1 CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N CVE-2026-34757 ( SUSE ): 5.1 CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N CVE-2026-34757 ( NVD ): 5.1 CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N CVE-2026-34757 ( NVD ): 4.4 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
Affected Products:	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

An update that solves one vulnerability can now be installed.

Description:

This update for libpng16 fixes the following issue:

• CVE-2026-34757: information disclosure and data corruption due to use-after-free in png_set_PLTE, png_set_tRNS and png_set_hIST (bsc#1261957).

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 for Rancher 5.3
  zypper in -t patch SUSE-SLE-Micro-5.3-2026-2057=1
• SUSE Linux Enterprise Micro 5.3
  zypper in -t patch SUSE-SLE-Micro-5.3-2026-2057=1
• SUSE Linux Enterprise Micro for Rancher 5.4
  zypper in -t patch SUSE-SLE-Micro-5.4-2026-2057=1
• SUSE Linux Enterprise Micro 5.4
  zypper in -t patch SUSE-SLE-Micro-5.4-2026-2057=1
• SUSE Linux Enterprise Micro 5.5
  zypper in -t patch SUSE-SLE-Micro-5.5-2026-2057=1
• SUSE Linux Enterprise Micro 5.2
  zypper in -t patch SUSE-SUSE-MicroOS-5.2-2026-2057=1
• SUSE Linux Enterprise Micro for Rancher 5.2
  zypper in -t patch SUSE-SUSE-MicroOS-5.2-2026-2057=1

Package List:

• SUSE Linux Enterprise Micro for Rancher 5.3 (aarch64 s390x x86_64)
  • libpng16-16-debuginfo-1.6.34-150000.3.25.1
  • libpng16-debugsource-1.6.34-150000.3.25.1
  • libpng16-16-1.6.34-150000.3.25.1
• SUSE Linux Enterprise Micro 5.3 (aarch64 s390x x86_64)
  • libpng16-16-debuginfo-1.6.34-150000.3.25.1
  • libpng16-debugsource-1.6.34-150000.3.25.1
  • libpng16-16-1.6.34-150000.3.25.1
• SUSE Linux Enterprise Micro for Rancher 5.4 (aarch64 s390x x86_64)
  • libpng16-16-debuginfo-1.6.34-150000.3.25.1
  • libpng16-debugsource-1.6.34-150000.3.25.1
  • libpng16-16-1.6.34-150000.3.25.1
• SUSE Linux Enterprise Micro 5.4 (aarch64 s390x x86_64)
  • libpng16-16-debuginfo-1.6.34-150000.3.25.1
  • libpng16-debugsource-1.6.34-150000.3.25.1
  • libpng16-16-1.6.34-150000.3.25.1
• SUSE Linux Enterprise Micro 5.5 (aarch64 ppc64le s390x x86_64)
  • libpng16-16-debuginfo-1.6.34-150000.3.25.1
  • libpng16-debugsource-1.6.34-150000.3.25.1
  • libpng16-16-1.6.34-150000.3.25.1
• SUSE Linux Enterprise Micro 5.2 (aarch64 s390x x86_64)
  • libpng16-16-debuginfo-1.6.34-150000.3.25.1
  • libpng16-debugsource-1.6.34-150000.3.25.1
  • libpng16-16-1.6.34-150000.3.25.1
• SUSE Linux Enterprise Micro for Rancher 5.2 (aarch64 s390x x86_64)
  • libpng16-16-debuginfo-1.6.34-150000.3.25.1
  • libpng16-debugsource-1.6.34-150000.3.25.1
  • libpng16-16-1.6.34-150000.3.25.1

References:

• https://www.suse.com/security/cve/CVE-2026-34757.html
• https://bugzilla.suse.com/show_bug.cgi?id=1261957