SUSE-SU-2026:4814-1: moderate: Security update for libpng16

[SLE-SECURITY-UPDATES]

# Security update for libpng16

Announcement ID: SUSE-SU-2026:4814-1  
Release Date: 2026-10-21T10:10:51Z  
Rating: moderate  
References:

  * bsc#1283183
  * jsc#PED-16190

  
Cross-References:

  * CVE-2026-46675

  
CVSS scores:

  * CVE-2026-46675 ( SUSE ):  8.2
    CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
  * CVE-2026-46675 ( SUSE ):  5.9 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

  
Affected Products:

  * SUSE Linux Enterprise Micro 5.3
  * SUSE Linux Enterprise Micro 5.4
  * SUSE Linux Enterprise Micro 5.5
  * SUSE Linux Enterprise Micro for Rancher 5.3
  * SUSE Linux Enterprise Micro for Rancher 5.4

  
  
An update that solves one vulnerability and contains one feature can now be
installed.

## Description:

This update for libpng16 fixes the following issues:

  * CVE-2026-46675: Use-after-free of zlib input in `png_read_end` after
    incomplete zTXt, iTXt or iCCP decompression (bsc#1283183).

Changes for libpng16:

  * version update to 1.6.59 (jsc#PED-16190):
  * Fixed a regression introduced in version 1.6.47 that caused libpng to reject
    hIST chunks in their correct position, after PLTE.
  * Prevented a double free of `png_struct` members after an allocation failure.
  * Applied fixes and updates to the CMake build.
  * Adopted the REUSE Specification for licensing the CI files.

## 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-5.3-2026-4814

  * SUSE Linux Enterprise Micro 5.3  
    zypper in -t patch SUSE-SLE-Micro-5.3-2026-4814

  * SUSE Linux Enterprise Micro for Rancher 5.4  
    zypper in -t patch SUSE-SLE-Micro-5.4-2026-4814

  * SUSE Linux Enterprise Micro 5.4  
    zypper in -t patch SUSE-SLE-Micro-5.4-2026-4814

  * SUSE Linux Enterprise Micro 5.5  
    zypper in -t patch SUSE-SLE-Micro-5.5-2026-4814

## Package List:

  * SUSE Linux Enterprise Micro for Rancher 5.3 (aarch64 s390x x86_64)
    * libpng16-16-1.6.59-150000.3.28.1
    * libpng16-debugsource-1.6.59-150000.3.28.1
    * libpng16-16-debuginfo-1.6.59-150000.3.28.1
  * SUSE Linux Enterprise Micro 5.3 (aarch64 s390x x86_64)
    * libpng16-16-1.6.59-150000.3.28.1
    * libpng16-debugsource-1.6.59-150000.3.28.1
    * libpng16-16-debuginfo-1.6.59-150000.3.28.1
  * SUSE Linux Enterprise Micro for Rancher 5.4 (aarch64 s390x x86_64)
    * libpng16-16-1.6.59-150000.3.28.1
    * libpng16-debugsource-1.6.59-150000.3.28.1
    * libpng16-16-debuginfo-1.6.59-150000.3.28.1
  * SUSE Linux Enterprise Micro 5.4 (aarch64 s390x x86_64)
    * libpng16-16-1.6.59-150000.3.28.1
    * libpng16-debugsource-1.6.59-150000.3.28.1
    * libpng16-16-debuginfo-1.6.59-150000.3.28.1
  * SUSE Linux Enterprise Micro 5.5 (aarch64 ppc64le s390x x86_64)
    * libpng16-16-1.6.59-150000.3.28.1
    * libpng16-debugsource-1.6.59-150000.3.28.1
    * libpng16-16-debuginfo-1.6.59-150000.3.28.1

## References:

  * https://www.suse.com/security/cve/CVE-2026-46675.html
  * https://bugzilla.suse.com/show_bug.cgi?id=1283183
  * https://jira.suse.com/browse/PED-16190

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