Vulnerability in Isc Kea
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. This issue affects Kea versions 2.6.0 through 2.6.4 and 3.0.0 through 3.0.2.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.012 (65.9th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 66th percentile — 65.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.014 · newest: 0.012 · change: -0.002
Affected products
- Isc Kea — versions 2.6.0, 3.0.0
Weakness classification (CWE)
References
- kb.isc.org/docs/cve-2026-3608 (vendor-advisory)
- downloads.isc.org/isc/kea/2.6.5 (patch)
- downloads.isc.org/isc/kea/3.0.3 (patch)
- af854a3a-2127-422b-91ae-364da2661108
- 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
- 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
- 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
- 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
- 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
Frequently asked questions
- What is CVE-2026-3608?
- CVE-2026-3608 is a high-severity vulnerability in Isc Kea, classified under Reachable Assertion. CVSS score: 7.5/10. Published 2026-03-25.
- How severe is CVE-2026-3608?
- High severity. CVSS v3 base score is 7.5 out of 10.