{"id":"CVE-2026-3608","state":"PUBLISHED","title":"Stack overflow in Kea daemons","description":"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.","publishedAt":"2026-03-25T08:46:48.992Z","updatedAt":"2026-07-15T01:02:33.862Z","severity":{"score":7.5,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","source":"isc"},"assigner":"isc","products":["ISC Kea"],"affected":[{"vendor":"ISC","product":"Kea","defaultStatus":"unaffected","versions":[{"version":"2.6.0","status":"affected","lessThanOrEqual":"2.6.4","versionType":"custom"},{"version":"3.0.0","status":"affected","lessThanOrEqual":"3.0.2","versionType":"custom"}]}],"references":["https://kb.isc.org/docs/cve-2026-3608","https://downloads.isc.org/isc/kea/2.6.5","https://downloads.isc.org/isc/kea/3.0.3","http://www.openwall.com/lists/oss-security/2026/03/25/6","https://access.redhat.com/security/cve/CVE-2026-3608","https://bugzilla.redhat.com/show_bug.cgi?id=2451139","https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-3608.json","https://access.redhat.com/errata/RHSA-2026:11344","https://access.redhat.com/errata/RHSA-2026:7342"],"weaknesses":["CWE-617"],"ingestedAt":"2026-10-29T20:11:50.837Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/3xxx/CVE-2026-3608.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-3608","state":"PUBLISHED","datePublished":"2026-03-25T08:46:48.992Z","dateUpdated":"2026-07-15T01:02:33.862Z","assignerShortName":"isc","assignerOrgId":"404fd4d2-a609-4245-b543-2c944a302a22","dateReserved":"2026-03-05T17:47:36.088Z"},"containers":{"cna":{"title":"Stack overflow in Kea daemons","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."}],"affected":[{"vendor":"ISC","product":"Kea","defaultStatus":"unaffected","versions":[{"version":"2.6.0","status":"affected","lessThanOrEqual":"2.6.4","versionType":"custom"},{"version":"3.0.0","status":"affected","lessThanOrEqual":"3.0.2","versionType":"custom"}]}],"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"]}],"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":[{"cweId":"CWE-617","lang":"en","type":"CWE","description":"CWE-617 Reachable Assertion"}]}],"providerMetadata":{"shortName":"isc","orgId":"404fd4d2-a609-4245-b543-2c944a302a22","dateUpdated":"2026-03-25T08:46:48.992Z"},"datePublic":"2026-03-25T00:00:00.000Z","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"}]}]}],"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."}],"source":{"discovery":"EXTERNAL"}},"adp":[{"title":"CISA ADP Vulnrichment","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"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","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":{"shortName":"CVE","orgId":"af854a3a-2127-422b-91ae-364da2661108","dateUpdated":"2026-03-25T17:22:19.777Z"}},{"title":"Kea: Kea: Denial of Service via maliciously crafted message","descriptions":[{"lang":"en","value":"A flaw was found in Kea. A remote attacker can send 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. This can cause a stack overflow error, leading to the daemon exiting and resulting in a Denial of Service (DoS)."}],"affected":[{"vendor":"Red Hat","product":"Red Hat Enterprise Linux 10","packageName":"kea","defaultStatus":"affected","versions":[{"version":"0:3.0.1-3.el10_1","status":"unaffected","lessThan":"*","versionType":"rpm"}],"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:10.1"]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux 10.0 Extended Update Support","packageName":"kea","defaultStatus":"affected","versions":[{"version":"0:2.6.3-2.el10_0.3","status":"unaffected","lessThan":"*","versionType":"rpm"}],"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux_eus:10.0"]}],"references":[{"url":"https://access.redhat.com/security/cve/CVE-2026-3608","tags":["vdb-entry","x_refsource_REDHAT"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2451139","name":"RHBZ#2451139","tags":["issue-tracking","x_refsource_REDHAT"]},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-3608.json","tags":["x_sadp-csaf-vex"]},{"url":"https://access.redhat.com/errata/RHSA-2026:11344","tags":["vendor-advisory","x_refsource_REDHAT"]},{"url":"https://access.redhat.com/errata/RHSA-2026:7342","tags":["vendor-advisory","x_refsource_REDHAT"]}],"metrics":[{"other":{"content":{"namespace":"https://access.redhat.com/security/updates/classification/","value":"Important"},"type":"Red Hat severity rating"}},{"cvssV3_1":{"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"},"format":"CVSS"}],"problemTypes":[{"descriptions":[{"cweId":"CWE-617","description":"Reachable Assertion","lang":"en","type":"CWE"}]}],"providerMetadata":{"shortName":"redhat-SADP","orgId":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c","dateUpdated":"2026-07-15T01:02:33.862Z"},"datePublic":"2026-03-25T08:46:48.992Z","solutions":[{"lang":"en","value":"RHSA-2026:11344: Red Hat Enterprise Linux AppStream EUS (v. 10.0), Red Hat Enterprise Linux BaseOS EUS (v. 10.0), Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0)"},{"lang":"en","value":"RHSA-2026:7342: Red Hat Enterprise Linux AppStream (v. 10), Red Hat Enterprise Linux BaseOS (v. 10), Red Hat Enterprise Linux CodeReady Linux Builder (v. 10)"}],"timeline":[{"lang":"en","time":"2026-03-25T09:01:15.192Z","value":"Reported to Red Hat."},{"lang":"en","time":"2026-03-25T08:46:48.992Z","value":"Made public."}],"x_adpType":"supplier","x_generator":{"engine":"sadp-cli 1.0.0"}}]}}}