---
id: CVE-2026-125184
title: FFmpeg 6.1 through 9.0.2 Information Disclosure via CamStudio Decoder cscd.c
summary: >-
  FFmpeg 6.1 through 9.0.2 contains an information disclosure vulnerability in
  the CamStudio decoder (libavcodec/cscd.c) that copies uninitialized heap
  memory into decoded frames when decompressed payloads are short. Attackers can
  supply a…
severity: low
cvss: 3.3
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N'
cvssSource: cna
cwe:
  - CWE-908
vendor: FFmpeg
product: FFmpeg
affected:
  - FFmpeg >= 6.1 <= 9.0.2
published: '2026-11-09'
updated: '2026-11-09'
sourceUpdated: '2026-11-09T19:11:08.881Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-125184'
references:
  - url: 'https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/25716'
  - url: >-
      https://github.com/FFmpeg/FFmpeg/commit/e58c4eb98f0f3c0523089fb9d037eedfcbd204d9
    label: Patch Commit
  - url: 'https://github.com/FFmpeg/FFmpeg/blob/n9.0.2/libavcodec/cscd.c#L152'
  - url: 'https://github.com/FFmpeg/FFmpeg'
  - url: >-
      https://www.vulncheck.com/advisories/ffmpeg-6.1-through-9.0.2-information-disclosure-via-camstudio-decoder-cscd-c
    label: >-
      VulnCheck Advisory: FFmpeg 6.1 through 9.0.2 Information Disclosure via
      CamStudio Decoder cscd.c
tags:
  - cve.org
ingestedAt: '2026-11-09T19:18:02.611Z'
---

## Overview

FFmpeg 6.1 through 9.0.2 contains an information disclosure vulnerability in the CamStudio decoder (libavcodec/cscd.c) that copies uninitialized heap memory into decoded frames when decompressed payloads are short. Attackers can supply a crafted AVI with a CSCD stream whose LZO or zlib frames decompress to fewer bytes than the frame size, recovering heap contents from the decoded or re-encoded output.

## Affected

- `FFmpeg >= 6.1 <= 9.0.2`

## Remediation

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