--- id: CVE-2026-56209 title: >- An arbitrary address write vulnerability was found in libaom, the reference AV1 codec implementation summary: >- 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 i… severity: high cvss: 7.1 cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H' cwe: - CWE-787 vendor: Red Hat product: aom affected: - aom (all versions) - aom (all versions) - aom (all versions) - rhaiis/vllm-cuda-rhel9 (all versions) - rhaiis/model-opt-cuda-rhel9 (all versions) - rhaiis/vllm-rocm-rhel9 (all versions) - rhaiis/model-opt-cuda-rhel9 (all versions) - rhaiis/vllm-spyre-rhel9 (all versions) - rhaiis/vllm-rocm-rhel9 (all versions) - rhaiis/vllm-cuda-rhel9 (all versions) - aom-main (all versions) - rhai/base-image-neuron-rhel9 (all versions) - rhai/base-image-rocm-7.0-rhel9 (all versions) - rhai/base-image-cuda-13.0-rhel9 (all versions) - rhai/base-image-tpu-rhel9 (all versions) - rhai/base-image-rocm-6.4-rhel9 (all versions) - rhai/base-image-cpu-rhel9 (all versions) - rhai/base-image-spyre-rhel9 (all versions) - rhai/base-image-cuda-12.9-rhel9 (all versions) - rhoai/odh-mlserver-rhel9 (all versions) - rhoai/odh-th06-cpu-torch210-py312-rhel9 (all versions) - rhoai/odh-th06-cuda130-torch210-py312-rhel9 (all versions) - rhoai/odh-th06-rocm64-torch291-py312-rhel9 (all versions) - rhai/base-image-tpu-rhel9 (all versions) - rhai/base-image-cpu-rhel9 (all versions) - rhai/base-image-gaudi-rhel9 (all versions) - rhai/base-image-spyre-rhel9 (all versions) - rhai/base-image-rocm-7.1-rhel9 (all versions) - rhai/base-image-cuda-12.9-rhel9 (all versions) - rhai/base-image-cuda-13.0-rhel9 (all versions) - rhai/base-image-rocm-6.4-rhel9 (all versions) - rhai/base-image-neuron-rhel9 (all versions) - rhai/base-image-cpu-rhel9 (all versions) - rhai/base-image-tpu-rhel9 (all versions) - rhai/base-image-gaudi-rhel9 (all versions) - rhai/base-image-cuda-13.0-rhel9 (all versions) - rhai/base-image-rubin-rhel9 (all versions) - rhai/base-image-spyre-rhel9 (all versions) - rhai/base-image-cuda-12.9-rhel9 (all versions) - rhai/base-image-rocm-7.14-rhel9 (all versions) - rhaiis/vllm-cpu-rhel9 (all versions) - rhaiis/vllm-neuron-rhel9 (all versions) - rhaiis/vllm-tpu-rhel9 (all versions) - rhaii/vllm-cpu-rhel9 (all versions) - rhaii/vllm-gaudi-rhel9 (all versions) - rhaii/vllm-neuron-rhel9 (all versions) - rhaii/vllm-tpu-rhel9 (all versions) - firefox (all versions) - thunderbird (all versions) - firefox (all versions) patched: - enterprise_linux_ai_3_3_for_rhel 9 - enterprise_linux_ai_3_4_for_rhel 9 - enterprise_linux_ai_3_5_for_rhel 9 - ai_inference_server 3.2 - ai_inference_server 3.3 - hardened_images - openshift_ai 3.3 - openshift_ai 3.4 published: '2026-06-19' updated: '2026-09-24' sourceUpdated: '2026-09-24T09:17:06.007' source: NVD sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-56209' references: - url: 'https://access.redhat.com/errata/RHSA-2026:30814' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2026:42875' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2026:51100' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2026:51146' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2026:60520' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2026:61627' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2026:61628' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2026:61629' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2026:68634' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2026:68637' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2026:68638' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2026:68639' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2026:68640' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2026:68696' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2026:68697' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2026:68698' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2026:68699' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2026:68708' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2026:68709' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2026:68710' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2026:69927' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2026:69929' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2026:69930' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2026:69931' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2026:69932' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2026:69933' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2026:69934' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2026:69935' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2026:71392' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2026:71393' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2026:71394' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2026:71395' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2026:71396' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2026:71397' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2026:71398' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2026:71399' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2026:71401' label: secalert@redhat.com - url: 'https://access.redhat.com/security/cve/CVE-2026-56209' label: secalert@redhat.com - url: 'https://aomedia.googlesource.com/aom/+/a93ba0ffaa' label: secalert@redhat.com - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2490800' label: secalert@redhat.com - url: 'https://issues.chromium.org/issues/503993984' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2026:30814' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:42875' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:51100' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:51146' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:60520' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:61627' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:61628' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:61629' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/security/cve/CVE-2026-56209' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2490800' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: >- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-56209.json label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://www.cve.org/CVERecord?id=CVE-2026-56209' - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-56209' tags: - nvd - cve.org - csaf - vex - red-hat ssvc: exploitation: none automatable: 'no' technicalImpact: total timestamp: '2026-06-25T03:55:32.013407Z' epss: 0.00643 epssPercentile: 0.48649 ingestedAt: '2026-06-29T13:42:11.973Z' --- ## Overview 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. ## Remediation Refer to the linked advisories for vendor-supplied fixes and affected version ranges. ## Vendor advisories - **RHSA-2026:51100** · Red Hat · fixed in: Red Hat Enterprise Linux AI 3.3 for RHEL 9 · released 2026-08-06 · [advisory](https://access.redhat.com/errata/RHSA-2026:51100) - **RHSA-2026:51146** · Red Hat · fixed in: Red Hat Enterprise Linux AI 3.4 for RHEL 9 · released 2026-08-06 · [advisory](https://access.redhat.com/errata/RHSA-2026:51146) - **RHSA-2026:42875** · Red Hat · fixed in: Red Hat Enterprise Linux AI 3.5 for RHEL 9 · released 2026-07-21 · [advisory](https://access.redhat.com/errata/RHSA-2026:42875) - **RHSA-2026:61628** · Red Hat · fixed in: Red Hat AI Inference Server 3.2 · released 2026-08-31 · [advisory](https://access.redhat.com/errata/RHSA-2026:61628) - **RHSA-2026:61627** · Red Hat · fixed in: Red Hat AI Inference Server 3.2 · released 2026-08-31 · [advisory](https://access.redhat.com/errata/RHSA-2026:61627) - **RHSA-2026:61629** · Red Hat · fixed in: Red Hat AI Inference Server 3.2 · released 2026-08-31 · [advisory](https://access.redhat.com/errata/RHSA-2026:61629) - **RHSA-2026:68696** · Red Hat · fixed in: Red Hat AI Inference Server 3.3 · released 2026-09-17 · [advisory](https://access.redhat.com/errata/RHSA-2026:68696) - **RHSA-2026:68699** · Red Hat · fixed in: Red Hat AI Inference Server 3.3 · released 2026-09-17 · [advisory](https://access.redhat.com/errata/RHSA-2026:68699) - **RHSA-2026:68698** · Red Hat · fixed in: Red Hat AI Inference Server 3.3 · released 2026-09-17 · [advisory](https://access.redhat.com/errata/RHSA-2026:68698) - **RHSA-2026:68697** · Red Hat · fixed in: Red Hat AI Inference Server 3.3 · released 2026-09-17 · [advisory](https://access.redhat.com/errata/RHSA-2026:68697) - **RHSA-2026:30814** · Red Hat · fixed in: Red Hat Hardened Images · released 2026-06-28 · [advisory](https://access.redhat.com/errata/RHSA-2026:30814) - **Red Hat VEX** · Important · affected: Red Hat AI Inference Server, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 9, Red Hat OpenShift AI (RHOAI) · no fix planned: Red Hat AI Inference Server, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 9, Red Hat OpenShift AI (RHOAI) · updated 2026-09-21 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-56209.json)