CVE-2026-34933
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.
Does this matter?
Lower severity and a low EPSS score (0.20%). Track it; it rarely justifies an emergency change on its own.
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 3.1
- 5.5 MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 0.20% probability · 10th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-617
- Affected
- avahi/avahi
- Source
- security-advisories@github.com
EPSS 0.2% since 26 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- https://github.com/avahi/avahi/commit/625ca0fac19229f6dfa3a6c6b698ae657187e50cPatch
- https://github.com/avahi/avahi/pull/891Issue Tracking, Patch
- https://github.com/avahi/avahi/security/advisories/GHSA-w65r-6gxh-vhvcExploit, Patch, Vendor Advisory
- http://www.openwall.com/lists/oss-security/2026/04/11/9Exploit, Mailing List, Third Party Advisory
- https://github.com/avahi/avahi/security/advisories/GHSA-w65r-6gxh-vhvcExploit, Patch, Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.