---
id: CVE-2026-125071
title: FFmpeg through 9.0.2 NULL Pointer Dereference in JV Video Decoder
summary: >-
  FFmpeg through 9.0.2 contains a NULL pointer dereference vulnerability in
  libavcodec/jvdec.c that allows attackers to crash applications by supplying
  oversized JV video packets. Attackers can pass a roughly 268435460-byte packet
  through …
severity: medium
cvss: 4.7
cvssVector: 'CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:H'
cvssSource: cna
cwe:
  - CWE-252
vendor: FFmpeg
product: FFmpeg
affected:
  - FFmpeg <= 9.0.2
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-11-09T21:05:10.542648Z'
published: '2026-11-09'
updated: '2026-11-09'
sourceUpdated: '2026-11-09T21:06:59.307Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-125071'
references:
  - url: 'https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/25704'
  - url: >-
      https://github.com/FFmpeg/FFmpeg/commit/839c93f261cd3e1719edfac4244a2d0055ce8841
    label: Patch Commit
  - url: 'https://github.com/FFmpeg/FFmpeg/blob/n9.0.2/libavcodec/jvdec.c#L169'
  - url: 'https://github.com/FFmpeg/FFmpeg'
  - url: >-
      https://www.vulncheck.com/advisories/ffmpeg-through-9.0.2-null-pointer-dereference-in-jv-video-decoder
    label: >-
      VulnCheck Advisory: FFmpeg through 9.0.2 NULL Pointer Dereference in JV
      Video Decoder
tags:
  - cve.org
ingestedAt: '2026-11-09T19:18:02.633Z'
---

## Overview

FFmpeg through 9.0.2 contains a NULL pointer dereference vulnerability in libavcodec/jvdec.c that allows attackers to crash applications by supplying oversized JV video packets. Attackers can pass a roughly 268435460-byte packet through the libavcodec API, overflowing the bit count so decode_frame() reads from a NULL buffer and causes denial of service.

## Affected

- `FFmpeg <= 9.0.2`

## Remediation

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