CVE-2025-68471

Name	CVE-2025-68471
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.
Source	CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
avahi (PTS)	bullseye	0.8-5+deb11u2	vulnerable
	bullseye (security)	0.8-5+deb11u3	vulnerable
	bookworm	0.8-10+deb12u1	vulnerable
	trixie	0.8-16	vulnerable
	forky, sid	0.8-17	vulnerable

The information below is based on the following data on fixed versions.

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
avahi	source	(unstable)	(unfixed)

Notes

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