SUSE-SU-2026:20073-1: important: Security update for libpng16

[SLE-SECURITY-UPDATES]

# Security update for libpng16

Announcement ID: SUSE-SU-2026:20073-1  
Release Date: 2026-01-12T11:15:37Z  
Rating: important  
References:

  * bsc#1254157
  * bsc#1254158
  * bsc#1254159
  * bsc#1254160
  * bsc#1254480

  
Cross-References:

  * CVE-2025-64505
  * CVE-2025-64506
  * CVE-2025-64720
  * CVE-2025-65018
  * CVE-2025-66293

  
CVSS scores:

  * CVE-2025-64505 ( SUSE ):  6.9
    CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N
  * CVE-2025-64505 ( SUSE ):  6.8 CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H
  * CVE-2025-64505 ( NVD ):  6.1 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H
  * CVE-2025-64506 ( SUSE ):  6.9
    CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N
  * CVE-2025-64506 ( SUSE ):  6.8 CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H
  * CVE-2025-64506 ( NVD ):  6.1 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H
  * CVE-2025-64720 ( SUSE ):  6.9
    CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N
  * CVE-2025-64720 ( SUSE ):  6.8 CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H
  * CVE-2025-64720 ( NVD ):  7.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H
  * CVE-2025-65018 ( SUSE ):  6.9
    CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N
  * CVE-2025-65018 ( SUSE ):  6.8 CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H
  * CVE-2025-65018 ( NVD ):  7.1 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H
  * CVE-2025-66293 ( SUSE ):  6.0
    CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N
  * CVE-2025-66293 ( SUSE ):  7.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H
  * CVE-2025-66293 ( NVD ):  7.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H

  
Affected Products:

  * SUSE Linux Micro 6.2

  
  
An update that solves five vulnerabilities can now be installed.

## Description:

This update for libpng16 fixes the following issues:

  * CVE-2025-64505: heap buffer over-read in `png_do_quantize` when processing
    PNG files malformed palette indices (bsc#1254157).
  * CVE-2025-64506: heap buffer over-read in `png_write_image_8bit` when
    processing 8-bit input with `convert_to_8bit` enabled (bsc#1254158).
  * CVE-2025-64720: out-of-bounds read in `png_image_read_composite` when
    processing palette images with `PNG_FLAG_OPTIMIZE_ALPHA` enabled
    (bsc#1254159).
  * CVE-2025-65018: heap buffer overflow in `png_image_finish_read` when
    processing specially crafted 16-bit interlaced PNGs with 8-bit output format
    (bsc#1254160).
  * CVE-2025-66293: out-of-bounds read of the `png_sRGB_base` array when
    processing palette PNG images with partial transparency and gamma correction
    (bsc#1254480).

## 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-6.2-131=1

## Package List:

  * SUSE Linux Micro 6.2 (aarch64 ppc64le s390x x86_64)
    * libpng16-16-1.6.44-160000.3.1
    * libpng16-16-debuginfo-1.6.44-160000.3.1
    * libpng16-debugsource-1.6.44-160000.3.1

## References:

  * https://www.suse.com/security/cve/CVE-2025-64505.html
  * https://www.suse.com/security/cve/CVE-2025-64506.html
  * https://www.suse.com/security/cve/CVE-2025-64720.html
  * https://www.suse.com/security/cve/CVE-2025-65018.html
  * https://www.suse.com/security/cve/CVE-2025-66293.html
  * https://bugzilla.suse.com/show_bug.cgi?id=1254157
  * https://bugzilla.suse.com/show_bug.cgi?id=1254158
  * https://bugzilla.suse.com/show_bug.cgi?id=1254159
  * https://bugzilla.suse.com/show_bug.cgi?id=1254160
  * https://bugzilla.suse.com/show_bug.cgi?id=1254480

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