Stack Overflow Vulnerability in Kea DHCP Daemons by ISC
CVE-2026-3608

7.5HIGH

Key Information:

Vendor

Isc
Status
Kea
Vendor
CVE Published:
25 March 2026

Badges

👾 Exploit Exists

What is CVE-2026-3608?

A vulnerability exists in ISC Kea DHCP that can be exploited by sending a specially crafted message to the kea-ctrl-agent, kea-dhcp-ddns, kea-dhcp4, or kea-dhcp6 daemons via any configured API socket or HA listener. This manipulation can lead to a stack overflow error causing the affected daemon to terminate unexpectedly. The issues impact Kea versions 2.6.0 to 2.6.4 and 3.0.0 to 3.0.2, potentially disrupting DHCP services and network management.

Affected Version(s)

Kea 2.6.0 <= 2.6.4

Kea 3.0.0 <= 3.0.2

References

https://kb.isc.org/docs/cve-2026-3608
vendor-advisory
https://downloads.isc.org/isc/kea/2.6.5
patch
https://downloads.isc.org/isc/kea/3.0.3
patch

CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

ISC would like to thank Ali Norouzi of Keysight for bringing this vulnerability to our attention.
.