---
id: CVE-2026-125196
title: FFmpeg through 9.0.2 Heap Buffer Overflow via liboapv APV Encoder Wrapper
summary: >-
  FFmpeg through 9.0.2 contains a heap buffer overflow vulnerability in
  liboapve_encode() in libavcodec/liboapvenc.c that allows attackers to corrupt
  heap memory by supplying frames larger than the configured encoder dimensions.
  Attackers …
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-122
vendor: FFmpeg
product: FFmpeg
affected:
  - FFmpeg >= 8.0 <= 9.0.2
published: '2026-11-09'
updated: '2026-11-09'
sourceUpdated: '2026-11-09T19:11:17.254Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-125196'
references:
  - url: 'https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/25416'
  - url: >-
      https://github.com/FFmpeg/FFmpeg/commit/87cdb6cd6a8d1ec201cb82b30e64d5f946939e23
    label: Patch Commit
  - url: 'https://github.com/FFmpeg/FFmpeg/blob/n9.0.2/libavcodec/liboapvenc.c#L578'
  - url: 'https://github.com/FFmpeg/FFmpeg'
  - url: >-
      https://www.vulncheck.com/advisories/ffmpeg-through-9.0.2-heap-buffer-overflow-via-liboapv-apv-encoder-wrapper
    label: >-
      VulnCheck Advisory: FFmpeg through 9.0.2 Heap Buffer Overflow via liboapv
      APV Encoder Wrapper
tags:
  - cve.org
ingestedAt: '2026-11-09T19:18:02.603Z'
---

## Overview

FFmpeg through 9.0.2 contains a heap buffer overflow vulnerability in liboapve_encode() in libavcodec/liboapvenc.c that allows attackers to corrupt heap memory by supplying frames larger than the configured encoder dimensions. Attackers can craft videos whose resolution changes mid-stream so that transcoding to APV without rescaling writes attacker-controlled pixel data past the imgb plane buffers.

## Affected

- `FFmpeg >= 8.0 <= 9.0.2`

## Remediation

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