CVE-2025-40779

Name
CVE-2025-40779
Description
If a DHCPv4 client sends a request with some specific options, and Kea fails to find an appropriate subnet for the client, the `kea-dhcp4` process will abort with an assertion failure. This happens only if the client request is unicast directly to Kea; broadcast messages do not cause the problem. This issue affects Kea versions 2.7.1 through 2.7.9, 3.0.0, and 3.1.0.
NVD Severity
medium
Other trackers
CVE, NVD, CERT, CVE Details, CIRCL, Arch Linux, Debian, Red Hat, Ubuntu, Gentoo, SUSE (Bugzilla), SUSE (CVE), Mageia
Mailing lists
oss-security, full-disclosure, bugtraq
Exploits
Exploit DB, Metasploit
Forges
GitHub (code, issues), Aports (code, issues)

References

Type URI
vendor-advisory https://kb.isc.org/docs/cve-2025-40779
af854a3a-2127-422b-91ae-364da2661108 http://www.openwall.com/lists/oss-security/2025/08/27/1

Match rules

CPE URI Source package Min version Max version
kea >= 2.7.1 <= 2.7.9
kea == 3.0.0 == 3.0.0
kea == 3.1.0 == 3.1.0
kea >= 2.6.0 <= 2.6.4

Vulnerable and fixed packages

Source package Branch Version Maintainer Status
kea edge-main 2.6.3-r2 Jakub Jirutka <jakub@jirutka.cz> possibly vulnerable
kea edge-main 2.6.3-r1 Jakub Jirutka <jakub@jirutka.cz> possibly vulnerable
kea edge-main 2.6.3-r0 Jakub Jirutka <jakub@jirutka.cz> possibly vulnerable
kea edge-main 2.6.2-r1 Jakub Jirutka <jakub@jirutka.cz> possibly vulnerable
kea edge-main 2.6.2-r0 Jakub Jirutka <jakub@jirutka.cz> possibly vulnerable
kea edge-main 2.6.1-r1 Jakub Jirutka <jakub@jirutka.cz> possibly vulnerable
kea 3.22-main 2.6.3-r0 Jakub Jirutka <jakub@jirutka.cz> possibly vulnerable
kea 3.21-main 2.6.2-r0 Jakub Jirutka <jakub@jirutka.cz> possibly vulnerable
kea 3.21-main 2.6.1-r1 Jakub Jirutka <jakub@jirutka.cz> possibly vulnerable