🛡️ CVE-2026-56209 on Debian — aom

⚪ Unknown ✅ No Known Exploit OSV

N/A

CVSS Score

0 Low4 Medium7 High9 Critical10

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.

Distribution advisory

This page covers CVE-2026-56209 as tracked by Debian, for the package aom. The fix is available in version 3.14.1-1; earlier versions remain affected.

How this vulnerability can be exploited

This issue can be reached over the network, attack complexity is low, an attacker needs no privileges on the target. A user must be tricked into taking some action. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality none, integrity low, availability high.

Weakness class

DEBIAN-CVE-2026-56209 is classified as CWE-787: Out-of-bounds Write. Data is written past the end or before the start of a buffer, corrupting whatever is stored there.

Affected software

DEBIAN-CVE-2026-56209 is recorded against 1 package.

aom (fixed in 3.14.1-1)

Timeline and source

Published on 19 June 2026 and last revised on 8 August 2026. No public exploit is currently recorded for this entry. Record sourced from OSV.

References

security-tracker.debian.org (Advisory)

Details

Severity Unknown

CVSS Score N/A

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

CWE N/A

Public Exploit ✅ No

Source OSV

Published 2026-06-19

Updated 2026-08-12

Modified 2026-08-08

Fix URL N/A

Affected Packages

Software	From version	Fixed in
aom	—	3.14.1-1

References

ADVISORY https://security-tracker.debian.org/tracker/CVE-2026-56209

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