CVE-2026-56209

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.

CVSS v3 7.1 HIGH

7.1^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.8 / Impact : 4.2

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact NONE

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-2026-56209
https://aomedia.googlesource.com/aom/+/a93ba0ffaa
https://bugzilla.redhat.com/show_bug.cgi?id=2490800
https://issues.chromium.org/issues/503993984

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-2026-56209

Mitre link : CVE-2026-56209

CVE.ORG link : CVE-2026-56209

JSON object : View

Products Affected

No product.

CWE

CWE-787

Out-of-bounds Write

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