CVE-2026-56208

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.

CVSS v3 7.6 HIGH

7.6^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.8 / Impact : 4.7

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact LOW

Integrity Impact LOW

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://access.redhat.com/errata/RHSA-2026:30814
https://access.redhat.com/security/cve/CVE-2026-56208
https://aomedia.googlesource.com/aom/+/243f8ae84b
https://bugzilla.redhat.com/show_bug.cgi?id=2490799
https://issues.chromium.org/issues/504317456

Configurations

No configuration.

History

29 Jun 2026, 01:16

Type	Values Removed	Values Added
References		() https://access.redhat.com/errata/RHSA-2026:30814 -

19 Jun 2026, 18:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-06-19 17:16

Updated : 2026-06-29 01:16

NVD link : CVE-2026-56208

Mitre link : CVE-2026-56208

CVE.ORG link : CVE-2026-56208

JSON object : View

Products Affected

No product.

CWE

CWE-122

Heap-based Buffer Overflow

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