Security update for libpng16

Announcement ID: SUSE-SU-2026:21138-1
Release Date: 2026-04-07T11:57:38Z
Rating: important
References:
Cross-References:
CVSS scores:
  • CVE-2026-33416 ( SUSE ): 9.2 CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
  • CVE-2026-33416 ( SUSE ): 8.1 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
  • CVE-2026-33416 ( NVD ): 7.5 CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
  • CVE-2026-33636 ( 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-2026-33636 ( SUSE ): 8.6 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H
  • CVE-2026-33636 ( NVD ): 7.6 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:H
Affected Products:
  • SUSE Linux Enterprise Server 16.0
  • SUSE Linux Enterprise Server for SAP applications 16.0

An update that solves two vulnerabilities can now be installed.

Description:

This update for libpng16 fixes the following issues:

  • CVE-2026-33416: use-after-free via pointer aliasing in png_set_tRNS and png_set_PLTE can lead to arbitrary code execution (bsc#1260754).
  • CVE-2026-33636: out-of-bounds read/write in the palette expansion on ARM Neon can lead to information leak and crashes (bsc#1260755).

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 Server 16.0
    zypper in -t patch SUSE-SLES-16.0-480=1
  • SUSE Linux Enterprise Server for SAP applications 16.0
    zypper in -t patch SUSE-SLES-16.0-480=1

Package List:

  • SUSE Linux Enterprise Server 16.0 (aarch64 ppc64le s390x x86_64)
    • libpng16-devel-1.6.44-160000.6.1
    • libpng16-compat-devel-1.6.44-160000.6.1
    • libpng16-16-1.6.44-160000.6.1
    • libpng16-tools-debuginfo-1.6.44-160000.6.1
    • libpng16-tools-1.6.44-160000.6.1
    • libpng16-debugsource-1.6.44-160000.6.1
    • libpng16-16-debuginfo-1.6.44-160000.6.1
  • SUSE Linux Enterprise Server 16.0 (x86_64)
    • libpng16-devel-x86-64-v3-1.6.44-160000.6.1
    • libpng16-compat-devel-x86-64-v3-1.6.44-160000.6.1
    • libpng16-16-x86-64-v3-debuginfo-1.6.44-160000.6.1
    • libpng16-16-x86-64-v3-1.6.44-160000.6.1
  • SUSE Linux Enterprise Server for SAP applications 16.0 (ppc64le x86_64)
    • libpng16-devel-1.6.44-160000.6.1
    • libpng16-compat-devel-1.6.44-160000.6.1
    • libpng16-16-1.6.44-160000.6.1
    • libpng16-tools-debuginfo-1.6.44-160000.6.1
    • libpng16-tools-1.6.44-160000.6.1
    • libpng16-debugsource-1.6.44-160000.6.1
    • libpng16-16-debuginfo-1.6.44-160000.6.1
  • SUSE Linux Enterprise Server for SAP applications 16.0 (x86_64)
    • libpng16-devel-x86-64-v3-1.6.44-160000.6.1
    • libpng16-compat-devel-x86-64-v3-1.6.44-160000.6.1
    • libpng16-16-x86-64-v3-debuginfo-1.6.44-160000.6.1
    • libpng16-16-x86-64-v3-1.6.44-160000.6.1

References: