SUSE-SU-2026:4796-1: moderate: Security update for libpng16

[SLE-SECURITY-UPDATES]

# Security update for libpng16

Announcement ID: SUSE-SU-2026:4796-1  
Release Date: 2026-10-21T07:53:21Z  
Rating: moderate  
References:

  * bsc#1283183

  
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:

  * Basesystem Module 15-SP7
  * openSUSE Leap 15.6
  * SUSE Linux Enterprise Desktop 15 SP7
  * SUSE Linux Enterprise Real Time 15 SP7
  * SUSE Linux Enterprise Server 15 SP7
  * SUSE Linux Enterprise Server for SAP Applications 15 SP7

  
  
An update that solves one vulnerability can now be installed.

## Description:

This update for libpng16 fixes the following issue:

  * 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:
  * 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:

  * openSUSE Leap 15.6  
    zypper in -t patch SUSE-2026-4796

  * Basesystem Module 15-SP7  
    zypper in -t patch SUSE-SLE-Module-Basesystem-15-SP7-2026-4796

## Package List:

  * openSUSE Leap 15.6 (aarch64 i586 ppc64le s390x x86_64)
    * libpng16-16-1.6.59-150600.3.26.1
    * libpng16-tools-1.6.59-150600.3.26.1
    * libpng16-debugsource-1.6.59-150600.3.26.1
    * libpng16-16-debuginfo-1.6.59-150600.3.26.1
    * libpng16-tools-debuginfo-1.6.59-150600.3.26.1
    * libpng16-compat-devel-1.6.59-150600.3.26.1
    * libpng16-devel-1.6.59-150600.3.26.1
  * openSUSE Leap 15.6 (x86_64)
    * libpng16-16-32bit-1.6.59-150600.3.26.1
    * libpng16-devel-32bit-1.6.59-150600.3.26.1
    * libpng16-compat-devel-32bit-1.6.59-150600.3.26.1
    * libpng16-16-32bit-debuginfo-1.6.59-150600.3.26.1
  * openSUSE Leap 15.6 (aarch64_ilp32)
    * libpng16-compat-devel-64bit-1.6.59-150600.3.26.1
    * libpng16-16-64bit-1.6.59-150600.3.26.1
    * libpng16-devel-64bit-1.6.59-150600.3.26.1
    * libpng16-16-64bit-debuginfo-1.6.59-150600.3.26.1
  * Basesystem Module 15-SP7 (aarch64 ppc64le s390x x86_64)
    * libpng16-16-1.6.59-150600.3.26.1
    * libpng16-debugsource-1.6.59-150600.3.26.1
    * libpng16-16-debuginfo-1.6.59-150600.3.26.1
    * libpng16-compat-devel-1.6.59-150600.3.26.1
    * libpng16-devel-1.6.59-150600.3.26.1
  * Basesystem Module 15-SP7 (x86_64)
    * libpng16-16-32bit-1.6.59-150600.3.26.1
    * libpng16-16-32bit-debuginfo-1.6.59-150600.3.26.1

## References:

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

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