Vulnerability in Avahi
CVE-2025-68471
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.004 (32.8th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 33rd percentile — 32.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: +0.000
Affected products
- Avahi — versions 0.9, <= 0.9-rc2
Weakness classification (CWE)
References
- github.com/avahi/avahi/security/advisories/GHSA-56rf-42xr-qmmg (Exploit, Patch, Vendor Advisory)
- github.com/avahi/avahi/issues/678 (Exploit, Patch, Issue Tracking)
- github.com/avahi/avahi/commit/9c6eb53bf2e290aed84b1f207e3ce35c54cc0aa1 (Patch)
Frequently asked questions
- What is CVE-2025-68471?
- CVE-2025-68471 is a medium-severity vulnerability in Avahi, classified under Reachable Assertion. CVSS score: 6.5/10. Published 2026-01-12.
- How severe is CVE-2025-68471?
- Medium severity. CVSS v3 base score is 6.5 out of 10.