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.
References
Link Resource
https://access.redhat.com/errata/RHSA-2026:30814
https://access.redhat.com/errata/RHSA-2026:42875
https://access.redhat.com/errata/RHSA-2026:47104
https://access.redhat.com/errata/RHSA-2026:47105
https://access.redhat.com/errata/RHSA-2026:51100
https://access.redhat.com/errata/RHSA-2026:51146
https://access.redhat.com/errata/RHSA-2026:54180
https://access.redhat.com/errata/RHSA-2026:54181
https://access.redhat.com/errata/RHSA-2026:54182
https://access.redhat.com/errata/RHSA-2026:54185
https://access.redhat.com/errata/RHSA-2026:54248
https://access.redhat.com/errata/RHSA-2026:54249
https://access.redhat.com/errata/RHSA-2026:54259
https://access.redhat.com/errata/RHSA-2026:54339
https://access.redhat.com/errata/RHSA-2026:60520
https://access.redhat.com/errata/RHSA-2026:61627
https://access.redhat.com/errata/RHSA-2026:61628
https://access.redhat.com/errata/RHSA-2026:61629
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
https://access.redhat.com/errata/RHSA-2026:30814
https://access.redhat.com/errata/RHSA-2026:42875
https://access.redhat.com/errata/RHSA-2026:47104
https://access.redhat.com/errata/RHSA-2026:47105
https://access.redhat.com/errata/RHSA-2026:51100
https://access.redhat.com/errata/RHSA-2026:51146
https://access.redhat.com/errata/RHSA-2026:54180
https://access.redhat.com/errata/RHSA-2026:54181
https://access.redhat.com/errata/RHSA-2026:54182
https://access.redhat.com/errata/RHSA-2026:54185
https://access.redhat.com/errata/RHSA-2026:54248
https://access.redhat.com/errata/RHSA-2026:54249
https://access.redhat.com/errata/RHSA-2026:54259
https://access.redhat.com/errata/RHSA-2026:54339
https://access.redhat.com/errata/RHSA-2026:60520
https://access.redhat.com/errata/RHSA-2026:61627
https://access.redhat.com/errata/RHSA-2026:61628
https://access.redhat.com/errata/RHSA-2026:61629
https://access.redhat.com/security/cve/CVE-2026-56208
https://bugzilla.redhat.com/show_bug.cgi?id=2490799
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-56208.json
Configurations

No configuration.

History

No history.

Information

Published : 2026-06-19 17:16

Updated : 2026-09-01 13:19


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