{"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":"2026-03-25T17:22:19.777Z"},"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"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-03-25T13:26:04.073699Z","id":"CVE-2026-3608","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"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":"2026-03-25T13:26:12.153Z"}},{"title":"CVE Program Container","references":[{"url":"http://www.openwall.com/lists/oss-security/2026/03/25/6"}],"providerMetadata":{"orgId":"af854a3a-2127-422b-91ae-364da2661108","shortName":"CVE","dateUpdated":"2026-03-25T17:22:19.777Z"}}]}}