CVE-2026-34933

EUVD-2026-18910
Avahi is a system which facilitates service discovery on a local network via the mDNS/DNS-SD protocol suite. Prior to version 0.9-rc4, any unprivileged local user can crash avahi-daemon by sending a single D-Bus method call with conflicting publish flags. This issue has been patched in version 0.9-rc4.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
5.5 MEDIUM
LOCAL
LOW
LOW
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Base Score
CVSS 3.x
EPSS Score
Percentile: 6%
Affected Products (NVD)
VendorProductVersion
avahiavahi
𝑥
< 0.9
avahiavahi
0.9:rc1
avahiavahi
0.9:rc2
avahiavahi
0.9:rc3
𝑥
= Vulnerable software versions
Debian logo
Debian Releases
Debian Product
Codename
avahi
bookworm
no-dsa
bullseye
postponed
bullseye (security)
vulnerable
forky
vulnerable
sid
vulnerable
trixie
no-dsa
Common Weakness Enumeration
References
https://github.com/avahi/avahi/commit/625ca0fac19229f6dfa3a6c6b698ae657187e50c
https://github.com/avahi/avahi/pull/891
https://github.com/avahi/avahi/security/advisories/GHSA-w65r-6gxh-vhvc
http://www.openwall.com/lists/oss-security/2026/04/11/9
https://github.com/avahi/avahi/security/advisories/GHSA-w65r-6gxh-vhvc