CVE-2026-56211 Libaom: libaom: remote code execution via svc layer context handling with attacker-controlled frames
Description
A remote code execution vulnerability was found in libaom, the reference AV1 codec implementation. Insufficient bounds validation in the AV1 encoder's SVC (Scalable Video Coding) layer ID control allows an attacker to supply crafted video frame pixels that overlap with internal encoder layer context structures. In fork-based video processing services, an attacker can use this to hijack the cyclic refresh map pointer, brute-force the process base address via a crash oracle, and redirect control flow to achieve arbitrary command execution. Exploitation requires the target service to use libaom with SVC encoding enabled and accept attacker-supplied video frames.
CVSS 3.1 detail
Vector CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:H/A:HExploitable remotely over the network, without an account and if a user takes an action; an attacker can seriously compromise confidentiality, integrity or availability.
- Attack vector
- Network
- Attack complexity
- High
- Privileges required
- None
- Interaction
- Required
- Scope
- Unchanged
- Confidentiality
- Low
- Integrity
- High
- Availability
- High
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| Red Hat Enterprise Linux 10 | Versions not published | |
| Red Hat Enterprise Linux 9 | Versions not published | |
| Red Hat Enterprise Linux AI (RHEL AI) 3 | Versions not published | |
| Red Hat Hardened Images 3.14 | earliest → < 3.14.0-0.1.hum1 | 3.14.0-0.1.hum1 |
| Red Hat AI Inference Server | Versions not published | |
| Red Hat OpenShift AI (RHOAI) | Versions not published | |
| Red Hat Enterprise Linux AI 3.5 for RHEL 9 | Versions not published | |
| Red Hat Enterprise Linux AI 3.3 for RHEL 9 | Versions not published | |
| Red Hat Enterprise Linux AI 3.4 for RHEL 9 | Versions not published |
Show the 6 other branches Hide the 6 other branches
| Product | Affected versions | Fixed in |
|---|---|---|
| Red Hat OpenShift AI 3.4 1791785804 | earliest → < 1791785804 | 1791785804 |
| Red Hat AI Inference Server 3.2 1787884873 | earliest → < 1787884873 | 1787884873 |
| Red Hat AI Inference Server 3.3 1789582776 | earliest → < 1789582776 | 1789582776 |
| Red Hat OpenShift AI 3.3 1789137636 | earliest → < 1789137636 | 1789137636 |
| Red Hat OpenShift AI 3.5 1790703706 | earliest → < 1790703706 | 1790703706 |
| Red Hat Enterprise Linux AI 3.3 1790954179 | earliest → < 1790954179 | 1790954179 |