{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-24401","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","state":"PUBLISHED","assignerShortName":"GitHub_M","dateReserved":"2026-01-22T18:19:49.172Z","datePublished":"2026-01-24T01:25:02.294Z","dateUpdated":"2026-01-26T16:17:24.487Z"},"containers":{"cna":{"title":"Avahi has Uncontrolled Recursion in lookup_handle_cname function","problemTypes":[{"descriptions":[{"cweId":"CWE-674","lang":"en","description":"CWE-674: Uncontrolled Recursion","type":"CWE"}]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":6.5,"baseSeverity":"MEDIUM","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","version":"3.1"}}],"references":[{"name":"https://github.com/avahi/avahi/security/advisories/GHSA-h4vp-5m8j-f6w3","tags":["x_refsource_CONFIRM"],"url":"https://github.com/avahi/avahi/security/advisories/GHSA-h4vp-5m8j-f6w3"},{"name":"https://github.com/avahi/avahi/issues/501","tags":["x_refsource_MISC"],"url":"https://github.com/avahi/avahi/issues/501"},{"name":"https://github.com/avahi/avahi/commit/78eab31128479f06e30beb8c1cbf99dd921e2524","tags":["x_refsource_MISC"],"url":"https://github.com/avahi/avahi/commit/78eab31128479f06e30beb8c1cbf99dd921e2524"}],"affected":[{"vendor":"avahi","product":"avahi","versions":[{"version":"< 78eab31128479f06e30beb8c1cbf99dd921e2524","status":"affected"}]}],"providerMetadata":{"orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","shortName":"GitHub_M","dateUpdated":"2026-01-24T01:25:02.294Z"},"descriptions":[{"lang":"en","value":"Avahi is a system which facilitates service discovery on a local network via the mDNS/DNS-SD protocol suite. In versions 0.9rc2 and below, avahi-daemon can be crashed via a segmentation fault by sending an unsolicited mDNS response containing a recursive CNAME record, where the alias and canonical name point to the same domain (e.g., \"h.local\" as a CNAME for \"h.local\"). This causes unbounded recursion in the lookup_handle_cname function, leading to stack exhaustion. The vulnerability affects record browsers where AVAHI_LOOKUP_USE_MULTICAST is set explicitly, which includes record browsers created by resolvers used by nss-mdns. This issue is patched in commit 78eab31128479f06e30beb8c1cbf99dd921e2524."}],"source":{"advisory":"GHSA-h4vp-5m8j-f6w3","discovery":"UNKNOWN"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-01-26T16:14:24.982686Z","id":"CVE-2026-24401","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-01-26T16:17:24.487Z"}}]}}