CVE-2025-68471

Avahi has a reachable assertion in lookup_start

State: Published
Severity: 6.5 Medium
Published: Jan 12, 2026
Updated: Jan 12, 2026
Reserved: Dec 18, 2025

Description

Avahi is a system which facilitates service discovery on a local network via the mDNS/DNS-SD protocol suite. In 0.9-rc2 and earlier, avahi-daemon can be crashed by sending 2 unsolicited announcements with CNAME resource records 2 seconds apart.

Scores

CVSS	Score	Vector	Source
3.1	6.5 Medium	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H	GitHub_M

Weaknesses

CWE-617 Reachable Assertion

Affected Products

Product	Versions
avahiavahi	<= 0.9-rc2Affected

References

https://github.com/avahi/avahi/security/advisories/GHSA-56rf-42xr-qmmg
https://github.com/avahi/avahi/issues/678
https://github.com/avahi/avahi/commit/9c6eb53bf2e290aed84b1f207e3ce35c54cc0aa1

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