CVE-2026-56209

HIGH 7.1

Libaom: libaom: arbitrary address write via svc layer context oob and cyclic refresh map pointer hijack

CVSS Score

7.1

EPSS Score

0.0%

EPSS Percentile

0th

An arbitrary address write 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 an attacker to inject an arbitrary pointer into the cyclic refresh map field via crafted image pixel values. The encoder then writes approximately 1,200 bytes at the attacker-controlled address. This is fully deterministic and does not require a separate information leak. An attacker who can supply frames to a network-facing libaom encoder with SVC enabled could exploit this for denial of service or potential code execution.

CWE	CWE-787
Vendor	red hat
Product	red hat hardened images
Published	Jun 19, 2026
Last Updated	Jul 15, 2026

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CVSS v3 Breakdown

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

None

Integrity

Low

Availability

High

Affected Versions

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 9

All versions affected

Red Hat / Red Hat Enterprise Linux 9

All versions affected

Red Hat / Red Hat Enterprise Linux AI (RHEL AI) 3

All versions affected