CVE-2026-56210

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).

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 LOW

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

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

Configurations

No configuration.

History

19 Jun 2026, 18:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-06-19 17:16

Updated : 2026-06-22 19:17

NVD link : CVE-2026-56210

Mitre link : CVE-2026-56210

CVE.ORG link : CVE-2026-56210

JSON object : View

Products Affected

No product.

CWE

CWE-125

Out-of-bounds Read

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