Medium severity · published Jan 12, 2026
CVE-2025-68471
Avahi has a reachable assertion in lookup_start
6.5
CVSS
0.4%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 35% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
AV
avahi · avahi
<= 0.9-rc2 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-68471
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-68471
Patch
https://github.com/avahi/avahi/commit/9c6eb53bf2e290aed84b1f207e3ce35c54cc0aa1
Exploit
https://github.com/avahi/avahi/issues/678
Exploit
https://github.com/avahi/avahi/security/advisories/GHSA-56rf-42xr-qmmg
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