CVE-2026-56209
Libaom: libaom: arbitrary address write via svc layer context oob and cyclic refresh map pointer hijack
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.
INFO
Published Date :
June 19, 2026, 4:28 p.m.
Last Modified :
June 19, 2026, 4:28 p.m.
Remotely Exploit :
Yes !
Source :
redhat
Affected Products
The following products are affected by CVE-2026-56209
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | CRITICAL | 53f830b8-0a3f-465b-8143-3b8a9948e749 |
Solution
- Update the libaom library to the latest version.
- Ensure input validation for SVC layer ID control.
- Review cyclic refresh map field handling.
- Test for proper pointer sanitization.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-56209 vulnerability anywhere in the article.