PT-2026-50983 · Red Hat · Red Hat Enterprise Linux 10+3

Published 2026-06-19 · Updated 2026-06-19 · CVE-2026-56210

Mitre

CVSS v3.1

7.1

High

Base vector

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

A heap-buffer-overflow read 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 setting a spatial layer id exceeding the configured number of layers. This causes an out-of-bounds heap read of approximately 40,728 bytes when computing a layer context array index. An attacker who can influence SVC encoder parameters in a network-facing service could exploit this for information disclosure (heap content leak) or denial of service (segmentation fault from hitting unmapped memory).

Fix

Out of bounds Read

Weakness Enumeration

CWE-125

Related Identifiers

CVE-2026-56210

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-2026-56210 · Security Note
• https://issues.chromium.org/issues/503975732 · Note
• https://aomedia.googlesource.com/aom/+/a93ba0ffaa · Note
• https://bugzilla.redhat.com/show_bug.cgi?id=2490801 · Note
• https://access.redhat.com/security/cve/CVE-2026-56210 · Note