Medium severity · published Apr 3, 2026
CVE-2026-34933
Avahi: Reachable assertion in `transport_flags_from_domain()` via conflicting publish flags crashes avahi-daemon
5.5
CVSS
0.2%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack vector
Local
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 10% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
AV
avahi · avahi
< 0.9-rc4 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-34933
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-34933
Patch
https://github.com/avahi/avahi/commit/625ca0fac19229f6dfa3a6c6b698ae657187e50c
Issue Tracking
https://github.com/avahi/avahi/pull/891
Exploit
https://github.com/avahi/avahi/security/advisories/GHSA-w65r-6gxh-vhvc
Exploit
http://www.openwall.com/lists/oss-security/2026/04/11/9
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