High severity · published Mar 25, 2026
CVE-2026-3608
Stack overflow in Kea daemons
7.5
CVSS
1.4%
EPSS
No
On KEV
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 vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.4% · higher than 72% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
KE
Kea · ISC
2.6.0 through 2.6.4; 3.0.0 through 3.0.2 · source: vendor
RH
Red Hat Enterprise Linux 10 · Red Hat
All versions, or not specified · source: CISA
RH
Red Hat Enterprise Linux 10.0 Extended Update Support · Red Hat
All versions, or not specified · source: CISA
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-3608
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-3608
downloads.isc.org
https://downloads.isc.org/isc/kea/2.6.5
downloads.isc.org
https://downloads.isc.org/isc/kea/3.0.3
kb.isc.org
https://kb.isc.org/docs/cve-2026-3608
www.openwall.com
http://www.openwall.com/lists/oss-security/2026/03/25/6
access.redhat.com
https://access.redhat.com/errata/RHSA-2026:11344
access.redhat.com
https://access.redhat.com/errata/RHSA-2026:7342
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