{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-3608", "assignerOrgId": "404fd4d2-a609-4245-b543-2c944a302a22", "state": "PUBLISHED", "assignerShortName": "isc", "dateReserved": "2026-03-05T17:47:36.088Z", "datePublished": "2026-03-25T08:46:48.992Z", "dateUpdated": "2026-03-25T08:46:48.992Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "404fd4d2-a609-4245-b543-2c944a302a22", "shortName": "isc", "dateUpdated": "2026-03-25T08:46:48.992Z"}, "title": "Stack overflow in Kea daemons", "datePublic": "2026-03-25T00:00:00.000Z", "affected": [{"vendor": "ISC", "product": "Kea", "versions": [{"version": "2.6.0", "lessThanOrEqual": "2.6.4", "status": "affected", "versionType": "custom"}, {"version": "3.0.0", "lessThanOrEqual": "3.0.2", "status": "affected", "versionType": "custom"}], "defaultStatus": "unaffected"}], "cpeApplicability": [{"nodes": [{"operator": "OR", "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:isc:kea:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.0", "versionEndIncluding": "2.6.4"}, {"vulnerable": true, "criteria": "cpe:2.3:a:isc:kea:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.0.0", "versionEndIncluding": "3.0.2"}]}]}], "metrics": [{"cvssV3_1": {"version": "3.1", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "availabilityImpact": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "baseScore": 7.5, "baseSeverity": "HIGH"}}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-617", "description": "CWE-617 Reachable Assertion"}]}], "descriptions": [{"lang": "en", "value": "Sending a maliciously crafted message to the kea-ctrl-agent, kea-dhcp-ddns, kea-dhcp4, or kea-dhcp6 daemons over any configured API socket or HA listener can cause the receiving daemon to exit with a stack overflow error.\nThis issue affects Kea versions 2.6.0 through 2.6.4 and 3.0.0 through 3.0.2."}], "impacts": [{"descriptions": [{"lang": "en", "value": "Loss of DHCP services"}]}], "workarounds": [{"lang": "en", "value": "Securing the API sockets with TLS, and requiring the client to authenticate with a certificate (mutual authentication), prevents the attacker from establishing an API connection to Kea. Set cert-required to true (the default) to require a client certificate. See: https://kea.readthedocs.io/en/stable/arm/security.html#tls-https-configuration"}], "exploits": [{"lang": "en", "value": "We are not aware of any active exploits."}], "solutions": [{"lang": "en", "value": "Upgrade to the patched release most closely related to your current version of Kea: 2.6.5 or 3.0.3."}], "credits": [{"lang": "en", "value": "ISC would like to thank Ali Norouzi of Keysight for bringing this vulnerability to our attention."}], "references": [{"url": "https://kb.isc.org/docs/cve-2026-3608", "name": "CVE-2026-3608", "tags": ["vendor-advisory"]}, {"url": "https://downloads.isc.org/isc/kea/2.6.5", "tags": ["patch"]}, {"url": "https://downloads.isc.org/isc/kea/3.0.3", "tags": ["patch"]}], "source": {"discovery": "EXTERNAL"}}}}

{}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "Sending a maliciously crafted message to the kea-ctrl-agent, kea-dhcp-ddns, kea-dhcp4, or kea-dhcp6 daemons over any configured API socket or HA listener can cause the receiving daemon to exit with a stack overflow error.\nThis issue affects Kea versions 2.6.0 through 2.6.4 and 3.0.0 through 3.0.2."}], "id": "CVE-2026-3608", "lastModified": "2026-03-25T09:16:25.810", "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": "Primary"}]}, "published": "2026-03-25T09:16:25.810", "references": [{"source": "security-officer@isc.org", "url": "https://downloads.isc.org/isc/kea/2.6.5"}, {"source": "security-officer@isc.org", "url": "https://downloads.isc.org/isc/kea/3.0.3"}, {"source": "security-officer@isc.org", "url": "https://kb.isc.org/docs/cve-2026-3608"}], "sourceIdentifier": "security-officer@isc.org", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-617"}], "source": "security-officer@isc.org", "type": "Secondary"}]}

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{}