CVE-2026-56210 Libaom: libaom: heap-buffer-overflow read via missing bounds check in ctrl_set_layer_id
A heap-buffer-overflow in libaom allows attackers to leak memory or crash services via crafted SVC encoder parameters.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2026-56210?
CVE-2026-56210 is a high-severity memory corruption vulnerability in Red Hat AI Inference Server, published on 19 Jun 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
A heap-buffer-overflow read 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 setting a spatial_layer_id exceeding the configured number of layers. This causes an out-of-bounds heap read of approximately 40,728 bytes when computing a layer context array index. An attacker who can influence SVC encoder parameters in a network-facing service could exploit this for information disclosure (heap content leak) or denial of service (segmentation fault from hitting unmapped memory).
Weakness: CWE-125
Which versions are affected by CVE-2026-56210?
How do I fix CVE-2026-56210?
Apply the vendor's patch.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-56210 being exploited?
There is no known exploitation of CVE-2026-56210 in the wild and no public exploit code.
Sources
Also known as DEBIAN-CVE-2026-56210, ECHO-4013-f50e-8dfc, GHSA-xpjh-7q9g-cgj5, ROOT-OS-DEBIAN-11-CVE-2026-56210, UBUNTU-CVE-2026-56210.