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National Vulnerability Database

National Vulnerability Database

NVD

National Vulnerability Database
  1. Vulnerabilities

CVE-2026-56208 Detail

Description

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.


Metrics

 
NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

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URL Source(s) Tag(s)
https://access.redhat.com/security/cve/CVE-2026-56208 Red Hat, Inc.
https://aomedia.googlesource.com/aom/+/243f8ae84b Red Hat, Inc.
https://bugzilla.redhat.com/show_bug.cgi?id=2490799 Red Hat, Inc.
https://issues.chromium.org/issues/504317456 Red Hat, Inc.

Weakness Enumeration

CWE-ID CWE Name Source
CWE-122 Heap-based Buffer Overflow Red Hat, Inc.  

Change History

2 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2026-56208
NVD Published Date:
06/19/2026
NVD Last Modified:
06/19/2026
Source:
Red Hat, Inc.