CVE-2026-3608
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.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (1.36%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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. This issue affects Kea versions 2.6.0 through 2.6.4 and 3.0.0 through 3.0.2.
- CVSS 3.1
- 7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 1.36% probability · 70th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-617
- Source
- security-officer@isc.org
References
- https://downloads.isc.org/isc/kea/2.6.5
- https://downloads.isc.org/isc/kea/3.0.3
- https://kb.isc.org/docs/cve-2026-3608
- http://www.openwall.com/lists/oss-security/2026/03/25/6
- https://access.redhat.com/errata/RHSA-2026:11344
- https://access.redhat.com/errata/RHSA-2026:7342
- 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
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.