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Vulnerability · Published Mar 25, 2026 · Assigned by isc

CVE-2026-3608Stack overflow in Kea daemons

High 7.5

In plain English

A high-severity security flaw in Kea from ISC. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.4% (higher than 72% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)7.5High
Exploit odds (30 days)1.4%top 27.7% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official 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.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
AlmaLinux:10kea-doc3.0.1-3.el10_1ALSA-2026:7342
Alpine:v3.22kea2.6.5-r0ALPINE-CVE-2026-3608
Alpine:v3.23kea3.0.3-r0ALPINE-CVE-2026-3608
Alpine:v3.24kea3.0.3-r0ALPINE-CVE-2026-3608
Debian:12isc-keano fix listedDEBIAN-CVE-2026-3608
Debian:13isc-kea2.6.3-1+deb13u1DEBIAN-CVE-2026-3608
Debian:14isc-kea3.0.3-1DEBIAN-CVE-2026-3608
Rocky Linux:10kea0:3.0.1-3.el10_1RLSA-2026:7342
Ubuntu:22.04:LTSisc-keano fix listedUBUNTU-CVE-2026-3608
Ubuntu:24.04:LTSisc-kea2.4.1-3ubuntu0.2UBUNTU-CVE-2026-3608
Ubuntu:25.10isc-kea2.6.3-2ubuntu0.1UBUNTU-CVE-2026-3608

Affected products (as reported)

VendorProductVersions
ISC Kea 2.6.0 – through 2.6.43.0.0 – through 3.0.2

Weakness: CWE-617 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References