VULNERABILITY INTELLIGENCE
CVE-2026-56208
CVSS score7.6 HIGH
EPSS probability0.62%
CISA KEVNot currently listed
Published2026-06-19
Last modified2026-10-19
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:H
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.
Weakness classification
- secalert@redhat.com: CWE-122
- 0b0ca135-0b70-47e7-9f44-1890c2a1c46c: CWE-122