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Vulnerability · Published Jun 19, 2026 · Assigned by redhat

CVE-2026-56208Libaom: libaom: heap buffer overflow in av1 encoder first-pass stats buffer via lap mode

High 7.6

In plain English

A high-severity heap buffer overflow in Red Hat AI Inference Server 3.2 from Red Hat. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.6% (higher than 50% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)7.6High
Exploit odds (30 days)0.6%top 49.9% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official description

A heap buffer overflow vulnerability was found in libaom, the reference AV1 codec implementation. A flaw in the AV1 encoder's Look-Ahead Processing (LAP) mode causes the first-pass stats ring buffer wrap-around guard to be bypassed when g_lag_in_frames is set to 1 or higher. This results in a 232-byte out-of-bounds write on every encoded frame after the second, corrupting adjacent heap objects. An attacker who can influence encoder configuration in a transcoding service or WebRTC session could exploit this to cause a denial of service (process crash) or potentially achieve code execution.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
AlmaLinux:8firefox140.13.0-1.el8_10.alma.1ALSA-2026:47105
AlmaLinux:9firefox140.13.0-1.el9_8.alma.1ALSA-2026:47104
AlmaLinux:9firefox-x11140.13.0-1.el9_8.alma.1ALSA-2026:47104
Debian:12aom3.6.0-1+deb12u3DEBIAN-CVE-2026-56208
Debian:13aom3.12.1-1+deb13u1DEBIAN-CVE-2026-56208
Debian:14aom3.14.1-1DEBIAN-CVE-2026-56208
Rocky Linux:8firefox0:140.13.0-1.el8_10RLSA-2026:47105
Rocky Linux:9firefox0:140.13.0-1.el9_8RLSA-2026:47104
Ubuntu:24.04:LTSaom3.8.2-2ubuntu0.2USN-8772-1
Ubuntu:24.04:LTSaom3.8.2-2ubuntu0.2UBUNTU-CVE-2026-56208
Ubuntu:25.10aomno fix listedUBUNTU-CVE-2026-56208
Ubuntu:26.04:LTSaom3.13.1-2ubuntu0.1USN-8772-1
Ubuntu:26.04:LTSaom3.13.1-2ubuntu0.1UBUNTU-CVE-2026-56208

Affected products (as reported)

VendorProductVersions
Red Hat Red Hat Enterprise Linux 10.0 Extended Update Support see references
Red Hat Red Hat Enterprise Linux 7 Extended Lifecycle Support see references
Red Hat Red Hat Enterprise Linux 8 see references
Red Hat Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support see references
Red Hat Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On see references
Red Hat Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support see references
Red Hat Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On see references
Red Hat Red Hat Enterprise Linux 8.8 Telecommunications Update Service see references
Red Hat Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions see references
Red Hat Red Hat Enterprise Linux 9 see references
Red Hat Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions see references
Red Hat Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions see references
Red Hat Red Hat Enterprise Linux 9.6 Extended Update Support see references
Red Hat Red Hat Enterprise Linux AI 3.3 for RHEL 9 see references
Red Hat Red Hat Enterprise Linux AI 3.4 for RHEL 9 see references
Red Hat Red Hat Enterprise Linux AI 3.5 for RHEL 9 see references
Red Hat Red Hat AI Inference Server 3.2 see references
Red Hat Red Hat AI Inference Server 3.2 see references
Red Hat Red Hat AI Inference Server 3.2 see references
Red Hat Red Hat AI Inference Server 3.3 see references
Red Hat Red Hat AI Inference Server 3.3 see references
Red Hat Red Hat AI Inference Server 3.3 see references
Red Hat Red Hat AI Inference Server 3.3 see references
Red Hat Red Hat Enterprise Linux AI 3.3 see references
Red Hat Red Hat Enterprise Linux AI 3.3 see references
Red Hat Red Hat Enterprise Linux AI 3.3 see references
Red Hat Red Hat Enterprise Linux AI 3.3 see references
Red Hat Red Hat Enterprise Linux AI 3.3 see references
Red Hat Red Hat Enterprise Linux AI 3.3 see references
Red Hat Red Hat Enterprise Linux AI 3.3 see references

Weakness: CWE-122 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:H

References