PT-2026-50984 · Red Hat · Red Hat Enterprise Linux 10+3

Published 2026-06-19 · Updated 2026-06-19 · CVE-2026-56211

NVD

CVSS v3.1

7.1

High

Base vector

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

A remote code execution vulnerability was found in libaom, the reference AV1 codec implementation. Insufficient bounds validation in the AV1 encoder's SVC (Scalable Video Coding) layer ID control allows an attacker to supply crafted video frame pixels that overlap with internal encoder layer context structures. In fork-based video processing services, an attacker can use this to hijack the cyclic refresh map pointer, brute-force the process base address via a crash oracle, and redirect control flow to achieve arbitrary command execution. Exploitation requires the target service to use libaom with SVC encoding enabled and accept attacker-supplied video frames.

Fix

Memory Corruption

Weakness Enumeration

CWE-787

Related Identifiers

CVE-2026-56211

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-2026-56211 · Security Note
• https://bugzilla.redhat.com/show_bug.cgi?id=2490802 · Note
• https://aomedia.googlesource.com/aom/+/a93ba0ffaa · Note
• https://issues.chromium.org/issues/503993985 · Note
• https://access.redhat.com/security/cve/CVE-2026-56211 · Note