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Vulnerability record · CVE-2026-34933 · published 3 April 2026

CVE-2026-34933: Avahi vulnerability

Avahi · Avahi

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.

5.5 CVSS 3.1 Medium EPSS 0.16% · top 95.4% CWE-617 · CWE-617
5.5CVSS 3.1 base score
0.16%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
5References, 3 tagged exploit
24 Jul 2026Last modified by NVD

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/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/avahi/avahi/commit/625ca0fac19229f6dfa3a6c6b698ae657187e50c Patch
https://github.com/avahi/avahi/pull/891 Issue TrackingPatch
https://github.com/avahi/avahi/security/advisories/GHSA-w65r-6gxh-vhvc ExploitPatchVendor Advisory
http://www.openwall.com/lists/oss-security/2026/04/11/9 ExploitMailing ListThird Party Advisory
https://github.com/avahi/avahi/security/advisories/GHSA-w65r-6gxh-vhvc ExploitPatchVendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2026-34933), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.