CVE-2025-68468

Publication date 12 January 2026

Last updated 19 January 2026

Ubuntu priority

Cvss 3 Severity Score

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.

Status

Show unmaintained releases

Package	Ubuntu Release	Status
avahi	25.10 questing	Fixed 0.8-16ubuntu3.1
	25.04 plucky	Ignored end of life, was needs-triage
	24.04 LTS noble	Fixed 0.8-13ubuntu6.1
	22.04 LTS jammy	Fixed 0.8-5ubuntu5.4
	20.04 LTS focal	Fixed 0.7-4ubuntu7.3+esm1
	18.04 LTS bionic	Fixed 0.7-3.1ubuntu1.3+esm3
	16.04 LTS xenial	Fixed 0.6.32~rc+dfsg-1ubuntu2.3+esm4
	14.04 LTS trusty	Fixed 0.6.31-4ubuntu1.3+esm4

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Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package	Patch details
avahi	Upstream: f66be13

Severity score breakdown

Parameter	Value
Base score	6.5 · Medium
Attack vector	Network
Attack complexity	Low
Privileges required	None
User interaction	Required
Scope	Unchanged
Confidentiality	None
Integrity impact	None
Availability impact	High
Vector	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

References

Related Ubuntu Security Notices (USN)

USN-7967-1
Avahi vulnerabilities
19 January 2026