PT-2026-50982 · Red Hat · Red Hat Enterprise Linux 10+3

Published 2026-06-19 · Updated 2026-06-19 · CVE-2026-56209

NVD

CVSS v3.1

7.1

High

Base vector

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

An arbitrary address write vulnerability was found in libaom, the reference AV1 codec implementation. A missing bounds check in the SVC (Scalable Video Coding) layer ID control function allows an attacker to inject an arbitrary pointer into the cyclic refresh map field via crafted image pixel values. The encoder then writes approximately 1,200 bytes at the attacker-controlled address. This is fully deterministic and does not require a separate information leak. An attacker who can supply frames to a network-facing libaom encoder with SVC enabled could exploit this for denial of service or potential code execution.

Fix

Memory Corruption

Weakness Enumeration

CWE-787

Related Identifiers

CVE-2026-56209

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-2026-56209 · Security Note
• https://issues.chromium.org/issues/503993984 · Note
• https://bugzilla.redhat.com/show_bug.cgi?id=2490800 · Note
• https://access.redhat.com/security/cve/CVE-2026-56209 · Note
• https://aomedia.googlesource.com/aom/+/a93ba0ffaa · Note