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Vulnerabilities CVE-2026-56209

CVE-2026-56209

High
Open
TLP:CLEAR

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

NVD CVE.org
Critical Infrastructure DDoS

AI Analysis

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Description

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.

Details

CVSS Score
7.1
EPSS Score
0.33%

25.5th percentile

CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H
Confidence
90%
Published
Jun 19, 2026
Last Modified
Aug 12, 2026
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