CVE-2025-40779

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{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Kea", "vendor": "ISC", "versions": [{"lessThanOrEqual": "2.7.9", "status": "affected", "version": "2.7.1", "versionType": "custom"}, {"status": "affected", "version": "3.0.0"}, {"status": "affected", "version": "3.1.0"}, {"lessThanOrEqual": "2.6.4", "status": "unaffected", "version": "2.6.0", "versionType": "custom"}]}], "source": "security-officer@isc.org"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "If a DHCPv4 client sends a request with some specific options, and Kea fails to find an appropriate subnet for the client, the `kea-dhcp4` process will abort with an assertion failure. This happens only if the client request is unicast directly to Kea; broadcast messages do not cause the problem.\nThis issue affects Kea versions 2.7.1 through 2.7.9, 3.0.0, and 3.1.0."}, {"lang": "es", "value": "Si un cliente DHCPv4 env\u00eda una solicitud con opciones espec\u00edficas y Kea no encuentra una subred adecuada para el cliente, el proceso `kea-dhcp4` se cancelar\u00e1 con un error de aserci\u00f3n. Esto solo ocurre si la solicitud del cliente se env\u00eda por unidifusi\u00f3n directamente a Kea; los mensajes de difusi\u00f3n no causan el problema. Este problema afecta a las versiones de Kea 2.7.1 a 2.7.9, 3.0.0 y 3.1.0."}], "id": "CVE-2025-40779", "lastModified": "2026-06-17T09:22:07.557", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 3.6, "source": "security-officer@isc.org", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2025-40779", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2025-08-28T14:07:45.683079Z", "version": "2.0.3"}}]}, "published": "2025-08-27T21:15:54.960", "references": [{"source": "security-officer@isc.org", "url": "https://kb.isc.org/docs/cve-2025-40779"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "http://www.openwall.com/lists/oss-security/2025/08/27/1"}], "sourceIdentifier": "security-officer@isc.org", "vulnStatus": "Deferred", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-476"}], "source": "security-officer@isc.org", "type": "Secondary"}]}

{"bugzilla": {"description": "kea: Kea crash upon interaction between specific client options and subnet selection", "id": "2391373", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2391373"}, "csaw": false, "cwe": "CWE-476", "details": ["No description is available for this CVE."], "name": "CVE-2025-40779", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Out of support scope", "package_name": "kea", "product_name": "Red Hat Enterprise Linux 10"}], "public_date": "2025-08-27T20:23:29Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2025-40779\nhttps://nvd.nist.gov/vuln/detail/CVE-2025-40779\nhttps://kb.isc.org/docs/cve-2025-40779"], "threat_severity": "Important"}

{"created": "2025-08-28T07:40:55.211737+00:00", "updated": "2025-08-28T07:40:55.211799+00:00", "vendors": ["isc", "isc$PRODUCT$kea"]}