{"id":"CVE-2026-34933","state":"PUBLISHED","title":"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.","publishedAt":"2026-04-03T22:43:26.683Z","updatedAt":"2026-04-11T18:09:34.774Z","severity":{"score":5.5,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","source":"GitHub_M"},"assigner":"GitHub_M","products":["avahi avahi"],"affected":[{"vendor":"avahi","product":"avahi","versions":[{"version":"< 0.9-rc4","status":"affected"}]}],"references":["https://github.com/avahi/avahi/security/advisories/GHSA-w65r-6gxh-vhvc","https://github.com/avahi/avahi/pull/891","https://github.com/avahi/avahi/commit/625ca0fac19229f6dfa3a6c6b698ae657187e50c","http://www.openwall.com/lists/oss-security/2026/04/11/9"],"weaknesses":["CWE-617"],"ingestedAt":"2026-10-29T20:11:40.391Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/34xxx/CVE-2026-34933.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-34933","state":"PUBLISHED","datePublished":"2026-04-03T22:43:26.683Z","dateUpdated":"2026-04-11T18:09:34.774Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-03-31T17:27:08.659Z"},"containers":{"cna":{"title":"Avahi: Reachable assertion in `transport_flags_from_domain()` via conflicting publish flags crashes avahi-daemon","descriptions":[{"lang":"en","value":"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."}],"affected":[{"vendor":"avahi","product":"avahi","versions":[{"version":"< 0.9-rc4","status":"affected"}]}],"references":[{"url":"https://github.com/avahi/avahi/security/advisories/GHSA-w65r-6gxh-vhvc","name":"https://github.com/avahi/avahi/security/advisories/GHSA-w65r-6gxh-vhvc","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/avahi/avahi/pull/891","name":"https://github.com/avahi/avahi/pull/891","tags":["x_refsource_MISC"]},{"url":"https://github.com/avahi/avahi/commit/625ca0fac19229f6dfa3a6c6b698ae657187e50c","name":"https://github.com/avahi/avahi/commit/625ca0fac19229f6dfa3a6c6b698ae657187e50c","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"LOCAL","availabilityImpact":"HIGH","baseScore":5.5,"baseSeverity":"MEDIUM","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","version":"3.1"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-617","lang":"en","description":"CWE-617: Reachable Assertion","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-04-03T22:43:26.683Z"},"source":{"advisory":"GHSA-w65r-6gxh-vhvc","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","references":[{"url":"https://github.com/avahi/avahi/security/advisories/GHSA-w65r-6gxh-vhvc","tags":["exploit"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-04-06T16:09:17.006482Z","id":"CVE-2026-34933","options":[{"Exploitation":"poc"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-04-06T16:09:21.475Z"}},{"title":"CVE Program Container","references":[{"url":"http://www.openwall.com/lists/oss-security/2026/04/11/9"}],"providerMetadata":{"shortName":"CVE","orgId":"af854a3a-2127-422b-91ae-364da2661108","dateUpdated":"2026-04-11T18:09:34.774Z"}}]}}}