---
id: CVE-2026-125201
title: FFmpeg 7.0 before 8.1.3 and 9.x before 9.0.2 Heap Overflow via vulkan_av1.c
summary: >-
  FFmpeg 7.0 before 8.1.3 and 9.x before 9.0.2 contains a heap out-of-bounds
  write vulnerability in vk_av1_decode_slice() in libavcodec/vulkan_av1.c
  because the tile-count limit is checked only on entry. Attackers can supply a
  crafted AV1 …
severity: high
cvss: 7
cvssVector: 'CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H'
cvssSource: cna
cwe:
  - CWE-787
vendor: FFmpeg
product: FFmpeg
affected:
  - FFmpeg >= 7.0 < 8.1.3
  - FFmpeg >= 9.0 < 9.0.2
published: '2026-11-09'
updated: '2026-11-09'
sourceUpdated: '2026-11-09T19:11:20.789Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-125201'
references:
  - url: 'https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/24289'
  - url: >-
      https://github.com/FFmpeg/FFmpeg/commit/d29ff884221042af219e53cc339a62356b061816
    label: Patch Commit
  - url: 'https://github.com/FFmpeg/FFmpeg/blob/n9.0.1/libavcodec/vulkan_av1.c#L578'
  - url: 'https://github.com/FFmpeg/FFmpeg'
  - url: >-
      https://www.vulncheck.com/advisories/ffmpeg-7.0-before-8.1.3-and-9-x-before-9.0.2-heap-overflow-via-vulkan-av1-c
    label: >-
      VulnCheck Advisory: FFmpeg 7.0 before 8.1.3 and 9.x before 9.0.2 Heap
      Overflow via vulkan_av1.c
tags:
  - cve.org
ingestedAt: '2026-11-09T19:18:02.600Z'
---

## Overview

FFmpeg 7.0 before 8.1.3 and 9.x before 9.0.2 contains a heap out-of-bounds write vulnerability in vk_av1_decode_slice() in libavcodec/vulkan_av1.c because the tile-count limit is checked only on entry. Attackers can supply a crafted AV1 stream with more than 256 tiles decoded via the Vulkan hardware accelerator to overflow tile_sizes and corrupt heap memory.

## Affected

- `FFmpeg >= 7.0 < 8.1.3`
- `FFmpeg >= 9.0 < 9.0.2`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.