CVE-2025-40779 describes a denial-of-service vulnerability in Kea DHCPv4 servers, specifically versions 2.7.1 through 2.7.9, 3.0.0, and 3.1.0. A malicious DHCPv4 client can trigger an assertion failure, causing the kea-dhcp4 process to abort, if it sends a unicast request with specific options and no suitable subnet is found. Rated 7.5 HIGH on CVSS, this vulnerability requires no user interaction and has a high impact on availability. There is currently no public exploit code, active exploitation, or significant community discussion surrounding this CVE.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
>= 2.7.1, <= 2.7.9CPE match | cpe:2.3:a:isc:kea:*:*:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
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