Answer in brief
CVE-2026-56209 records a High severity (CVSS 7.1) vulnerability in Libaom: libaom: arbitrary address write via svc layer context oob and cyclic refresh map pointer hijack. The current sources do not mark it as known exploited. The current feed maps Red Hat/firefox (generic), Red Hat/rhai/base-image-cpu-rhel9 (generic), Red Hat/rhai/base-image-cuda-12.9-rhel9 (generic), Red Hat/rhai/base-image-cuda-13.0-rhel9 (generic) and additional mapped packages. Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 7.1. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Red Hat/firefox (generic), Red Hat/rhai/base-image-cpu-rhel9 (generic), Red Hat/rhai/base-image-cuda-12.9-rhel9 (generic), Red Hat/rhai/base-image-cuda-13.0-rhel9 (generic) and additional mapped packages. Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Red Hat/firefoxgeneric | * | Not reported |
| Red Hat/rhai/base-image-cpu-rhel9generic | * | Not reported |
| Red Hat/rhai/base-image-cuda-12.9-rhel9generic | * | Not reported |
| Red Hat/rhai/base-image-cuda-13.0-rhel9generic | * | Not reported |
| Red Hat/rhai/base-image-gaudi-rhel9generic | * | Not reported |
| Red Hat/rhai/base-image-neuron-rhel9generic | * | Not reported |
| Red Hat/rhai/base-image-rocm-6.4-rhel9generic | * | Not reported |
| Red Hat/rhai/base-image-rocm-7.0-rhel9generic | * | Not reported |
| Red Hat/rhai/base-image-rocm-7.1-rhel9generic | * | Not reported |
| Red Hat/rhai/base-image-spyre-rhel9generic | * | Not reported |
| Red Hat/rhai/base-image-tpu-rhel9generic | * | Not reported |
| Red Hat/rhaii/model-opt-cuda-rhel9generic | * | Not reported |
| Red Hat/rhaiis/model-opt-cuda-rhel9generic | * | Not reported |
| Red Hat/rhaiis/vllm-cpu-rhel9generic | * | Not reported |
| Red Hat/rhaiis/vllm-cuda-rhel9generic | * | Not reported |
| Red Hat/rhaiis/vllm-neuron-rhel9generic | * | Not reported |
| Red Hat/rhaiis/vllm-rocm-rhel9generic | * | Not reported |
| Red Hat/rhaiis/vllm-spyre-rhel9generic | * | Not reported |
| Red Hat/rhaiis/vllm-tpu-rhel9generic | * | Not reported |
| Red Hat/rhaii/vllm-cpu-rhel9generic | * | Not reported |
| Red Hat/rhaii/vllm-cuda-rhel9generic | * | Not reported |
| Red Hat/rhaii/vllm-gaudi-rhel9generic | * | Not reported |
| Red Hat/rhaii/vllm-neuron-rhel9generic | * | Not reported |
| Red Hat/rhaii/vllm-rocm-rhel9generic | * | Not reported |
| Red Hat/rhaii/vllm-spyre-rhel9generic | * | Not reported |
| Red Hat/rhaii/vllm-tpu-rhel9generic | * | Not reported |
| Red Hat/rhoai/odh-trustyai-garak-lls-provider-dsp-rhel9generic | * | Not reported |
| Red Hat/thunderbirdgeneric | * | Not reported |
Published upstream
Jun 19, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Nov 4, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Jun 19, 2026
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.
Quoted source text, attributed separately from HOL analysis.