CVE-2026-24401

{"id": "CVE-2026-24401", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-24401", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-01-26T16:14:24.982686Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "security-advisories@github.com", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 6.5, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "REQUIRED", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}, "impactScore": 3.6, "exploitabilityScore": 2.8}, {"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 6.5, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "REQUIRED", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}, "impactScore": 3.6, "exploitabilityScore": 2.8}]}, "affected": [{"source": "security-advisories@github.com", "affectedData": [{"vendor": "avahi", "product": "avahi", "versions": [{"status": "affected", "version": "< 78eab31128479f06e30beb8c1cbf99dd921e2524"}]}]}], "published": "2026-01-24T02:15:48.760", "references": [{"url": "https://github.com/avahi/avahi/commit/78eab31128479f06e30beb8c1cbf99dd921e2524", "tags": ["Patch"], "source": "security-advisories@github.com"}, {"url": "https://github.com/avahi/avahi/issues/501", "tags": ["Issue Tracking", "Patch"], "source": "security-advisories@github.com"}, {"url": "https://github.com/avahi/avahi/security/advisories/GHSA-h4vp-5m8j-f6w3", "tags": ["Vendor Advisory"], "source": "security-advisories@github.com"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Secondary", "source": "security-advisories@github.com", "description": [{"lang": "en", "value": "CWE-674"}]}], "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."}, {"lang": "es", "value": "Avahi es un sistema que facilita el descubrimiento de servicios en una red local a trav\u00e9s de la suite de protocolos mDNS/DNS-SD. En las versiones 0.9rc2 e inferiores, avahi-daemon puede ser bloqueado mediante un fallo de segmentaci\u00f3n al enviar una respuesta mDNS no solicitada que contenga un registro CNAME recursivo, donde el alias y el nombre can\u00f3nico apuntan al mismo dominio (por ejemplo, 'h.local' como CNAME para 'h.local'). Esto causa una recursi\u00f3n ilimitada en la funci\u00f3n lookup_handle_cname, lo que lleva al agotamiento de la pila. La vulnerabilidad afecta a los navegadores de registros donde AVAHI_LOOKUP_USE_MULTICAST est\u00e1 configurado expl\u00edcitamente, lo que incluye los navegadores de registros creados por los resolvedores utilizados por nss-mdns. Este problema est\u00e1 parcheado en el commit 78eab31128479f06e30beb8c1cbf99dd921e2524."}], "lastModified": "2026-06-17T10:23:00.687", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:avahi:avahi:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "6481267F-934F-4A0C-9B25-59738E798458", "versionEndExcluding": "0.9"}, {"criteria": "cpe:2.3:a:avahi:avahi:0.9:rc1:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "76971590-AEED-4CB1-B7B7-45EA8FD11524"}, {"criteria": "cpe:2.3:a:avahi:avahi:0.9:rc2:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "83D94AE4-46AC-4955-BB0D-193CF79149A1"}], "operator": "OR"}]}], "sourceIdentifier": "security-advisories@github.com"}