SUSE-SU-2026:1500-1: important: Security update for libpng15

[SLE-UPDATES]

# Security update for libpng15

Announcement ID: SUSE-SU-2026:1500-1  
Release Date: 2026-04-20T16:16:44Z  
Rating: important  
References:

  * bsc#1260754
  * bsc#1261957

  
Cross-References:

  * CVE-2026-33416
  * CVE-2026-34757

  
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-2026-34757 ( 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

  
Affected Products:

  * SUSE Linux Enterprise High Performance Computing 12 SP5
  * SUSE Linux Enterprise Server 12 SP5
  * SUSE Linux Enterprise Server 12 SP5 LTSS
  * SUSE Linux Enterprise Server 12 SP5 LTSS Extended Security
  * SUSE Linux Enterprise Server for SAP Applications 12 SP5

  
  
An update that solves two vulnerabilities can now be installed.

## Description:

This update for libpng15 fixes the following issues:

  * CVE-2026-34757: use-after-free in `png_set_PLTE`, `png_set_tRNS` and
    `png_set_hIST` can lead to information disclosure and data corruption
    (bsc#1261957).
  * 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).

## 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 12 SP5 LTSS  
    zypper in -t patch SUSE-SLE-SERVER-12-SP5-LTSS-2026-1500=1

  * SUSE Linux Enterprise Server 12 SP5 LTSS Extended Security  
    zypper in -t patch SUSE-SLE-SERVER-12-SP5-LTSS-EXTENDED-SECURITY-2026-1500=1

## Package List:

  * SUSE Linux Enterprise Server 12 SP5 LTSS (aarch64 ppc64le s390x x86_64)
    * libpng15-debugsource-1.5.22-10.10.1
    * libpng15-15-debuginfo-1.5.22-10.10.1
    * libpng15-15-1.5.22-10.10.1
  * SUSE Linux Enterprise Server 12 SP5 LTSS Extended Security (x86_64)
    * libpng15-debugsource-1.5.22-10.10.1
    * libpng15-15-debuginfo-1.5.22-10.10.1
    * libpng15-15-1.5.22-10.10.1

## References:

  * https://www.suse.com/security/cve/CVE-2026-33416.html
  * https://www.suse.com/security/cve/CVE-2026-34757.html
  * https://bugzilla.suse.com/show_bug.cgi?id=1260754
  * https://bugzilla.suse.com/show_bug.cgi?id=1261957

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