SB2026051107 - Red Hat Enterprise Linux 9 update for libpng

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Main Vulnerability Database SB2026051107

SB2026051107 - Red Hat Enterprise Linux 9 update for libpng

Published: May 11, 2026

Security Bulletin ID SB2026051107
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Remote access
Highest impact Denial of service

Breakdown by Severity

Medium 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Out-of-bounds read (CVE-ID: CVE-2026-33636)

The vulnerability allows a remote attacker to cause a denial of service, disclose sensitive information, and corrupt memory.

The vulnerability exists due to out-of-bounds read and out-of-bounds write in the ARM/AArch64 Neon palette expansion path when decoding a crafted paletted PNG image with palette expansion enabled. A remote attacker can supply a specially crafted PNG image to cause a denial of service, disclose sensitive information, and corrupt memory.

Only builds targeting ARM/AArch64 with Neon enabled are affected. The issue is triggered for palette-based images during palette expansion, with the RGBA path requiring a tRNS chunk and the RGB path requiring no tRNS chunk. User interaction is required to open or process the crafted image.


Remediation

Install update from vendor's website.

References