CVE-2026-56211

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.

CVSS v3 7.1 HIGH

7.1^/10

CVSS v3 : HIGH

Vector :

Exploitability : 1.6 / Impact : 5.5

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact LOW

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://access.redhat.com/errata/RHSA-2026:30814
https://access.redhat.com/security/cve/CVE-2026-56211
https://aomedia.googlesource.com/aom/+/a93ba0ffaa
https://bugzilla.redhat.com/show_bug.cgi?id=2490802
https://issues.chromium.org/issues/503993985

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-2026-56211

Mitre link : CVE-2026-56211

CVE.ORG link : CVE-2026-56211

JSON object : View

Products Affected

No product.

CWE

CWE-787

Out-of-bounds Write

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