CVE-2026-3608

Summary

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 Software

Weaknesses

• CWE-617: CWE-617 Reachable Assertion

Workarounds

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

ADP Enrichment

CISA ADP Vulnrichment

• SSVC:
• Exploitation: none
  • Automatable: yes
  • Technical Impact: partial

CVE Program Container

Additional References

• http://www.openwall.com/lists/oss-security/2026/03/25/6

Kea: Kea: Denial of Service via maliciously crafted message

Additional References

• 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

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

• ←Previous
• Next→