CVE-2026-56210
HIGH EPSS 13.5%
Published Jun 19, 20261w ago · Modified Jun 22, 20261w ago
7.1 CVSS 3.1
Published Jun 19, 2026 1w ago
Last Modified Jun 22, 2026 1w ago
Description
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 Details
Base Score
Exploitability
Impact
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction Required
Scope Unchanged
Confidentiality Low
Integrity None
Availability High
Threat Intelligence
EPSS Exploit Probability
13.5% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available
Weaknesses 1
CWE-125 Out-of-bounds Read Memory Safety
References 4
- access.redhat.com https://access.redhat.com/security/cve/CVE-2026-56210
- aomedia.googlesource.com https://aomedia.googlesource.com/aom/+/a93ba0ffaa
- bugzilla.redhat.com https://bugzilla.redhat.com/show_bug.cgi?id=2490801
- issues.chromium.org https://issues.chromium.org/issues/503975732
Remediation
No remediation data recorded yet
Check vendor advisories and the NVD entry for patch availability.