CVE-2025-68468

Name	CVE-2025-68468
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 unsolicited announcements containing CNAME resource records pointing it to resource records with short TTLs. As soon as they expire avahi-daemon crashes.
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-cp79-r4x9-vf52
https://github.com/avahi/avahi/issues/683
Fixed by: https://github.com/avahi/avahi/commit/f66be13d7f31a3ef806d226bf8b67240179d309a