SUSE-SU-2026:2057-1: moderate: Security update for libpng16

[SLE-SECURITY-UPDATES]

# 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

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