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.
Scores
CVSS v3
6.5
EPSS
0.0001
EPSS Percentile
2.6%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
no
Technical Impact
partial
Details
CWE
CWE-617
Status
published
Products (2)
avahi/avahi
0.9 rc1
avahi/avahi
< 0.9
Published
Jan 12, 2026
Tracked Since
Feb 18, 2026