CVE-2026-56208

HIGH 7.6

Libaom: libaom: heap buffer overflow in av1 encoder first-pass stats buffer via lap mode

CVSS Score

7.6

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-122
Vendor	red hat
Product	red hat enterprise linux 8
Published	Jun 19, 2026
Last Updated	Aug 3, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:H

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

Low

Integrity

Low

Availability

High

Affected Versions

Red Hat / Red Hat Enterprise Linux 8

All versions affected

Red Hat / Red Hat Enterprise Linux 9

All versions affected

Red Hat / Red Hat Enterprise Linux AI 3.5 for RHEL 9

All versions affected

Red Hat / Red Hat Hardened Images

All versions affected

Red Hat / Red Hat AI Inference Server

All versions affected

Red Hat / Red Hat AI Inference Server

All versions affected

Red Hat / Red Hat AI Inference Server

All versions affected

Red Hat / Red Hat AI Inference Server

All versions affected

Red Hat / Red Hat AI Inference Server

All versions affected

Red Hat / Red Hat AI Inference Server

All versions affected

Red Hat / Red Hat AI Inference Server

All versions affected

Red Hat / Red Hat AI Inference Server

All versions affected

Red Hat / Red Hat AI Inference Server

All versions affected

Red Hat / Red Hat AI Inference Server

All versions affected

Red Hat / Red Hat AI Inference Server

All versions affected

Red Hat / Red Hat AI Inference Server

All versions affected

Red Hat / Red Hat AI Inference Server

All versions affected

Red Hat / Red Hat AI Inference Server

All versions affected

Red Hat / Red Hat AI Inference Server

All versions affected

Red Hat / Red Hat Enterprise Linux 10

All versions affected

Red Hat / Red Hat Enterprise Linux 10

All versions affected

Red Hat / Red Hat Enterprise Linux 7

All versions affected

Red Hat / Red Hat Enterprise Linux 8

All versions affected

Red Hat / Red Hat Enterprise Linux 9

All versions affected