CVE-2026-34933
Avahi: Reachable assertion in `transport_flags_from_domain()` via conflicting publish flags crashes avahi-daemon
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.
INFO
Published Date :
April 3, 2026, 11:17 p.m.
Last Modified :
April 13, 2026, 5:26 p.m.
Remotely Exploit :
No
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | MEDIUM | [email protected] |
Solution
- Update Avahi to version 0.9-rc4 or later.
- Restart the avahi-daemon service after updating.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-34933.
| URL | Resource |
|---|---|
| https://github.com/avahi/avahi/commit/625ca0fac19229f6dfa3a6c6b698ae657187e50c | Patch |
| https://github.com/avahi/avahi/pull/891 | Issue Tracking Patch |
| https://github.com/avahi/avahi/security/advisories/GHSA-w65r-6gxh-vhvc | Exploit Patch Vendor Advisory |
| http://www.openwall.com/lists/oss-security/2026/04/11/9 | Exploit Mailing List Third Party Advisory |
| https://github.com/avahi/avahi/security/advisories/GHSA-w65r-6gxh-vhvc | Exploit Patch Vendor Advisory |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-34933 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-34933
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-34933 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-34933 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
Apr. 13, 2026
Action Type Old Value New Value Added CPE Configuration OR *cpe:2.3:a:avahi:avahi:*:*:*:*:*:*:*:* versions up to (excluding) 0.9 *cpe:2.3:a:avahi:avahi:0.9:rc1:*:*:*:*:*:* *cpe:2.3:a:avahi:avahi:0.9:rc2:*:*:*:*:*:* *cpe:2.3:a:avahi:avahi:0.9:rc3:*:*:*:*:*:* Added Reference Type CVE: http://www.openwall.com/lists/oss-security/2026/04/11/9 Types: Exploit, Mailing List, Third Party Advisory Added Reference Type GitHub, Inc.: https://github.com/avahi/avahi/commit/625ca0fac19229f6dfa3a6c6b698ae657187e50c Types: Patch Added Reference Type GitHub, Inc.: https://github.com/avahi/avahi/pull/891 Types: Issue Tracking, Patch Added Reference Type GitHub, Inc.: https://github.com/avahi/avahi/security/advisories/GHSA-w65r-6gxh-vhvc Types: Exploit, Patch, Vendor Advisory Added Reference Type CISA-ADP: https://github.com/avahi/avahi/security/advisories/GHSA-w65r-6gxh-vhvc Types: Exploit, Patch, Vendor Advisory -
CVE Modified by af854a3a-2127-422b-91ae-364da2661108
Apr. 11, 2026
Action Type Old Value New Value Added Reference http://www.openwall.com/lists/oss-security/2026/04/11/9 -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Apr. 06, 2026
Action Type Old Value New Value Added Reference https://github.com/avahi/avahi/security/advisories/GHSA-w65r-6gxh-vhvc -
New CVE Received by [email protected]
Apr. 03, 2026
Action Type Old Value New Value Added 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. Added CVSS V3.1 AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H Added CWE CWE-617 Added Reference https://github.com/avahi/avahi/commit/625ca0fac19229f6dfa3a6c6b698ae657187e50c Added Reference https://github.com/avahi/avahi/pull/891 Added Reference https://github.com/avahi/avahi/security/advisories/GHSA-w65r-6gxh-vhvc