Avahi 0.9-rc2: avahi-daemon crash via short TTL CNAME (CVE-2025-68468)
CVE-2025-68468 Published on January 12, 2026
Avahi has a reachable assertion in lookup_multicast_callback
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.
Vulnerability Analysis
CVE-2025-68468 is exploitable with network access, requires user interaction. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have no impact on confidentiality and integrity, and a high impact on availability.
Weakness Type
What is an assertion failure Vulnerability?
The product contains an assert() or similar statement that can be triggered by an attacker, which leads to an application exit or other behavior that is more severe than necessary.
CVE-2025-68468 has been classified to as an assertion failure vulnerability or weakness.
Products Associated with CVE-2025-68468
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Affected Versions
avahi Version <= 0.9-rc2 is affected by CVE-2025-68468Exploit Probability
EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.