RHSA-2026:4731 - Security Advisory

Topic

An update for libpng is now available for Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support and Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On.

Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

Description

The libpng packages contain a library of functions for creating and manipulating Portable Network Graphics (PNG) image format files.

Security Fix(es):

• libpng: libpng: Information disclosure and denial of service via integer truncation in simplified write API (CVE-2026-22801)
• libpng: libpng: Denial of service and information disclosure via heap buffer over-read in png_image_finish_read (CVE-2026-22695)
• libpng: LIBPNG has a heap buffer overflow in png_set_quantize (CVE-2026-25646)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Solution

For details on how to apply this update, which includes the changes described in this advisory, refer to:

https://access.redhat.com/articles/11258

Affected Products

• Red Hat Enterprise Linux for x86_64 - Extended Update Support Extension 8.4 x86_64
• Red Hat Enterprise Linux Server - AUS 8.4 x86_64

Fixes

• BZ - 2428824 - CVE-2026-22801 libpng: libpng: Information disclosure and denial of service via integer truncation in simplified write API
• BZ - 2428825 - CVE-2026-22695 libpng: libpng: Denial of service and information disclosure via heap buffer over-read in png_image_finish_read
• BZ - 2438542 - CVE-2026-25646 libpng: LIBPNG has a heap buffer overflow in png_set_quantize

CVEs

• CVE-2026-22695
• CVE-2026-22801
• CVE-2026-25646

References

• https://access.redhat.com/security/updates/classification/#important