SUSE-SU-2026:20750-1: important: Security update for libpng16

[SLE-SECURITY-UPDATES]

# Security update for libpng16

Announcement ID: SUSE-SU-2026:20750-1  
Release Date: 2026-03-17T15:51:45Z  
Rating: important  
References:

  * bsc#1257364
  * bsc#1257365
  * bsc#1258020

  
Cross-References:

  * CVE-2025-28162
  * CVE-2025-28164
  * 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-2026-25646 ( 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 Micro 6.2

  
  
An update that solves three vulnerabilities can now be installed.

## Description:

This update for libpng16 fixes the following issues:

  * CVE-2026-25646: Heap buffer overflow vulnerability in
    png_set_dither/png_set_quantize (bsc#1258020)
  * CVE-2025-28162: Fixed a memory leaks when running `pngimage`. (bsc#1257364)
  * CVE-2025-28164: Fixed a memory leaks when running `pngimage`. (bsc#1257365)

## 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 Micro 6.2  
    zypper in -t patch SUSE-SL-Micro-6.2-396=1

## Package List:

  * SUSE Linux Micro 6.2 (aarch64 ppc64le s390x x86_64)
    * libpng16-16-1.6.44-160000.5.1
    * libpng16-debugsource-1.6.44-160000.5.1
    * libpng16-16-debuginfo-1.6.44-160000.5.1

## 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-2026-25646.html
  * 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

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