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Fencer Vulns
high 7.1

CVE-2026-56211 json

Libaom: libaom: remote code execution via svc layer context handling with attacker-controlled frames

published 2026-06-19 4 mo ago modified 2026-11-04 4 d ago also EUVD-2026-38047

cvss
7.1
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.9%
EPSS 0.9% chance of exploitation in 30 days, percentile 59%
public exploits
0
none known

Summary

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.

Patch / fix

  • Red Hat Red Hat Enterprise Linux AI 3.3 for RHEL 9 0:3.14.0-1.el9ai
  • Red Hat Red Hat Enterprise Linux AI 3.4 for RHEL 9 0:3.14.0-1.el9ai
  • Red Hat Red Hat Enterprise Linux AI 3.5 for RHEL 9 0:3.14.0-1.el9ai
  • Red Hat Red Hat AI Inference Server 3.2 1787772157, 1787860580, 1787884873
  • Red Hat Red Hat AI Inference Server 3.3 1789502493, 1789504371, 1789508287, 1789582776
  • Red Hat Red Hat Enterprise Linux AI 3.3 1790791893, 1790850900, 1790866732, 1790936334, 1790936351, 1790954179
  • Red Hat Red Hat Hardened Images 3.14.0-0.1.hum1
  • Red Hat Red Hat OpenShift AI 3.3 1789137548, 1789137552, 1789137607, 1789137636, 1789137641
  • Red Hat Red Hat OpenShift AI 3.4 1786611800, 1787076481, 1787076778, 1787077779, 1788197530, 1788197549, 1788197632, 1788197677, 1788197680, 1788197744, 1788197747, 1788199622, 1791785804
  • Red Hat Red Hat OpenShift AI 3.5 1788197385, 1788197492, 1788197512, 1788197542, 1788197688, 1788197975, 1788198016, 1788198404, 1788198407, 1790703552, 1790703554, 1790703557, 1790703630, 1790703645, 1790703656, 1790703706
  • aom Debian 12 3.6.0-1+deb12u3
  • aom Debian 13 3.12.1-1+deb13u1
  • aom Debian 14 3.14.1-1

debian advisories DEBIAN-CVE-2026-56211

  • aom Ubuntu 24.04 LTS 3.8.2-2ubuntu0.2
  • aom Ubuntu 26.04 LTS 3.13.1-2ubuntu0.1
  • aom Ubuntu Pro 22.04 LTS 3.3.0-1ubuntu0.1+esm1

ubuntu advisories UBUNTU-CVE-2026-56211

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • aom enterprise linux ai 3.5, enterprise linux ai 3.4, enterprise linux ai 3.3 3.14.0-1.el9ai
  • libaom enterprise linux ai 3.5, enterprise linux ai 3.4, enterprise linux ai 3.3 3.14.0-1.el9ai
  • aom hummingbird 1 3.14.0-0.1.hum1
  • libaom hummingbird 1 3.14.0-0.1.hum1

red hat advisories RHSA-2026:51146RHSA-2026:51100RHSA-2026:42875RHSA-2026:30814

  • libaom SLES for SAP 15 SP6, SLES 15 SP6-LTSS, SLE Module for Desktop Applications 15 SP7 +1 more 3.7.1-150600.3.9.1
  • libyuv SLES for SAP 15 SP6, SLES 15 SP6-LTSS, SLE Module for Desktop Applications 15 SP7 +1 more 20230517+a377993-150600.3.4.2
  • SVT-AV1 SLES for SAP 15 SP6, SLES 15 SP6-LTSS, SLE Module for Desktop Applications 15 SP7 +1 more 1.8.0-150600.3.2.5
  • libaom SLES for SAP 15 SP5, SLES for SAP 15 SP4, SLES 15 SP5-LTSS +5 more 3.7.1-150400.3.12.1
  • libaom SLES for SAP applications 16.0, SLES 16.0 3.11.0-160000.3.1

suse advisories SUSE-SU-2026:3224-1SUSE-SU-2026:2829-1SUSE-SU-2026:22369-1

  • libaom openSUSE Tumbleweed 3.15.2-1.1
  • libaom openSUSE Leap 16.0 3.11.0-160000.3.1

opensuse advisories openSUSE-SU-2026:12197-1openSUSE-SU-2026:21061-1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-56211 updated cvss 7.1

libaom: libaom: remote code execution via SVC layer context handling with attacker-controlled frames

  • Red Hat AI Inference Server rhaii/vllm-cpu-rhel9, rhaii/vllm-tpu-rhel9, rhaii/vllm-cuda-rhel9, rhaii/vllm-rocm-rhel9, rhaiis/vllm-cpu-rhel9, rhaiis/vllm-tpu-rhel9, +5 more
    affected: workaround, no fix available, no fix planned “Will not fix”
  • Red Hat Enterprise Linux 9 firefox, firefox-x11, thunderbird, firefox 140.11.0-1.el10_2, thunderbird 140.11.0-1.el10_2 Red Hat Enterprise Linux 10 firefox 140.11.0-1.el10_2, thunderbird 140.11.0-1.el10_2
    affected: workaround, no fix available
  • Red Hat AI Inference Server 3.2 rhaiis/vllm-cuda-rhel9 1787860580, rhaiis/vllm-rocm-rhel9 1787884873, rhaiis/model-opt-cuda-rhel9 1787772157
    fixed: vendor fix RHSA-2026:61628
  • Red Hat AI Inference Server 3.3 rhaiis/vllm-cuda-rhel9 1789582776, rhaiis/vllm-rocm-rhel9 1789504371, rhaiis/vllm-spyre-rhel9 1789502493, rhaiis/model-opt-cuda-rhel9 1789508287
    fixed: vendor fix RHSA-2026:68696
  • Red Hat Enterprise Linux AI 3.3 rhelai3/bootc-cuda-rhel9 1790866732, rhelai3/bootc-rocm-rhel9 1790791893, rhelai3/bootc-aws-cuda-rhel9 1790936334, rhelai3/bootc-gcp-cuda-rhel9 1790936334, rhelai3/disk-image-cuda-rhel9 1790954179, rhelai3/bootc-azure-cuda-rhel9 1790936351, +1 more
    fixed: vendor fix RHSA-2026:76041
  • Red Hat Enterprise Linux AI 3.3 for RHEL 9 aom 3.14.0-1.el9ai, libaom 3.14.0-1.el9ai
    fixed: vendor fix RHSA-2026:51100
  • Red Hat Enterprise Linux AI 3.4 for RHEL 9 aom 3.14.0-1.el9ai, libaom 3.14.0-1.el9ai
    fixed: vendor fix RHSA-2026:51146
  • Red Hat Enterprise Linux AI 3.5 for RHEL 9 aom 3.14.0-1.el9ai, libaom 3.14.0-1.el9ai
    fixed: vendor fix RHSA-2026:42875
show 6 more
  • Red Hat Hardened Images aom 3.14.0-0.1.hum1, libaom 3.14.0-0.1.hum1
    fixed: vendor fix RHSA-2026:30814
  • Red Hat OpenShift AI 3.3 rhai/base-image-cpu-rhel9 1789137641, rhai/base-image-tpu-rhel9 1789137548, rhai/base-image-spyre-rhel9 1789137607, rhai/base-image-neuron-rhel9 1789137552, rhai/base-image-rocm-6.4-rhel9 1789137548, rhai/base-image-rocm-7.0-rhel9 1789137548, +2 more
    fixed: vendor fix RHSA-2026:68708
  • Red Hat OpenShift AI 3.4 rhoai/odh-mlserver-rhel9 1786611800, rhai/base-image-cpu-rhel9 1788197530, rhai/base-image-tpu-rhel9 1788197680, rhai/base-image-gaudi-rhel9 1788197632, rhai/base-image-spyre-rhel9 1788197747, rhai/base-image-rocm-6.4-rhel9 1788197677, +7 more
    fixed: vendor fix RHSA-2026:69929
  • Red Hat OpenShift AI 3.5 rhai/base-image-cpu-rhel9 1788198407, rhai/base-image-cpu-rhel9 1790703656, rhai/base-image-tpu-rhel9 1788197492, rhai/base-image-tpu-rhel9 1790703554, rhai/base-image-gaudi-rhel9 1788197542, rhai/base-image-gaudi-rhel9 1790703552, +11 more
    fixed: vendor fix RHSA-2026:71393
  • Red Hat OpenShift AI (RHOAI) rhoai/odh-automl-rhel9, rhoai/odh-autorag-rhel9, rhoai/odh-llm-d-kv-cache-rhel9, rhoai/odh-spark-operator-rhel9, rhoai/odh-llama-stack-core-rhel9, rhoai/odh-kserve-autogluon-server-rhel9, +8 more
    not affected: vulnerable code not in execute path
  • Red Hat OpenShift AI 3.4 rhoai/odh-cli-rhel9 1787330837, rhoai/odh-cli-rhel9 1791509689, rhoai/rhai-cli-rhel9 1787330837, rhoai/rhai-cli-rhel9 1791509689, rhoai/odh-automl-rhel9 1786612415, rhoai/odh-automl-rhel9 1791535789, +201 more
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
total
Assessed
4 mo ago

Exploit prediction

0.88% chance of exploitation in the next 30 days, higher than 59% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 7.1 CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:H/A:H
CISA ADP 3.1 7.1 CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:H/A:H

Affected products

  • Red Hat Red Hat Enterprise Linux AI 3.3 for RHEL 9
  • Red Hat Red Hat Enterprise Linux AI 3.4 for RHEL 9
  • Red Hat Red Hat Enterprise Linux AI 3.5 for RHEL 9
  • Red Hat Red Hat AI Inference Server 3.2
  • Red Hat Red Hat AI Inference Server 3.3
  • Red Hat Red Hat Enterprise Linux AI 3.3
  • Red Hat Red Hat Hardened Images
  • Red Hat Red Hat OpenShift AI 3.3
  • Red Hat Red Hat OpenShift AI 3.4
  • Red Hat Red Hat OpenShift AI 3.5
  • Red Hat Red Hat AI Inference Server
  • Red Hat Red Hat Enterprise Linux 10
  • Red Hat Red Hat Enterprise Linux 9
  • Red Hat Red Hat OpenShift AI (RHOAI)

Classification

Weakness

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.