PT-2026-50981 · Red Hat · Red Hat Enterprise Linux 10+3

Published 2026-06-19 · Updated 2026-06-19 · CVE-2026-56208

Mitre

CVSS v3.1

7.6

High

Base vector

AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:H

A heap buffer overflow vulnerability was found in libaom, the reference AV1 codec implementation. A flaw in the AV1 encoder's Look-Ahead Processing (LAP) mode causes the first-pass stats ring buffer wrap-around guard to be bypassed when g lag in frames is set to 1 or higher. This results in a 232-byte out-of-bounds write on every encoded frame after the second, corrupting adjacent heap objects. An attacker who can influence encoder configuration in a transcoding service or WebRTC session could exploit this to cause a denial of service (process crash) or potentially achieve code execution.

Fix

Heap Based Buffer Overflow

Weakness Enumeration

CWE-122

Related Identifiers

CVE-2026-56208

Affected Products

Red Hat Enterprise Linux 10

Red Hat Enterprise Linux 9

Red Hat Enterprise Linux Ai (Rhel Ai) 3

Red Hat Hardened Images

References · 5

• https://nvd.nist.gov/vuln/detail/CVE-2026-56208 · Security Note
• https://access.redhat.com/security/cve/CVE-2026-56208 · Note
• https://aomedia.googlesource.com/aom/+/243f8ae84b · Note
• https://issues.chromium.org/issues/504317456 · Note
• https://bugzilla.redhat.com/show_bug.cgi?id=2490799 · Note