{"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)","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)","thunderbird (all versions)","rhai/base-image-gaudi-rhel9 (all versions)","rhai/base-image-rocm-7.1-rhel9 (all versions)","rhoai/odh-automl-rhel9","rhoai/odh-autorag-rhel9","rhoai/odh-kserve-autogluon-server-rhel9","rhoai/odh-llama-stack-core-rhel9","rhoai/odh-llm-d-kv-cache-rhel9","rhoai/odh-spark-operator-rhel9","rhoai/odh-th06-cpu-torch291-py312-rhel9","rhoai/odh-th06-cuda130-torch291-py312-rhel9","rhoai/odh-trustyai-garak-lls-provider-dsp-rhel9 (all versions)","rhoai/odh-workbench-codeserver-datascience-cpu-py312-rhel9","rhoai/odh-workbench-jupyter-datascience-cpu-py312-rhel9","rhoai/odh-workbench-jupyter-minimal-cpu-py312-rhel9","rhoai/odh-workbench-jupyter-minimal-cuda-py312-rhel9","rhoai/odh-workbench-jupyter-minimal-rocm-py312-rhel9"],"published":"2026-06-19","updated":"2026-09-21","sourceUpdated":"2026-09-21T11:17:10.100","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/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":0.0035,"epssPercentile":0.28596,"ingestedAt":"2026-06-29T13:42:11.973Z","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"],"slug":"CVE-2026-56209","body":"## Overview\n\nAn 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Vendor advisories\n\n- **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)\n- **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)\n- **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)\n- **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)\n- **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)\n- **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)\n- **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)\n- **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)\n- **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)\n- **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)\n- **RHSA-2026:30814** · Red Hat · fixed in: Red Hat Hardened Images · released 2026-06-28 · [advisory](https://access.redhat.com/errata/RHSA-2026:30814)\n- **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)","depth":"twilight","depthScore":39,"depthScoreParts":{"impact":39.1,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}