vulnerability
Red Hat: CVE-2025-40779: kea: Kea crash upon interaction between specific client options and subnet selection (Multiple Advisories)
| Severity | CVSS | Published | Added | Modified |
|---|---|---|---|---|
| 8 | (AV:N/AC:L/Au:N/C:N/I:N/A:C) | Aug 27, 2025 | Jan 27, 2026 | Jan 27, 2026 |
Severity
8
CVSS
(AV:N/AC:L/Au:N/C:N/I:N/A:C)
Published
Aug 27, 2025
Added
Jan 27, 2026
Modified
Jan 27, 2026
Description
A vulnerability was found in Kea. When an attacker who is an existing client with an assigned IP sends a crafted unicast packet directly to the server's IP and Kea cannot find any subnets that match that client's credentials, the server crashes causing a Denial of Service via assertion/NULL-path failure. This vulnerability does not persist for broadcast packets because they ignore such unverifiable clients.
Solutions
redhat-upgrade-kearedhat-upgrade-kea-debuginforedhat-upgrade-kea-debugsourceredhat-upgrade-kea-devel-debuginforedhat-upgrade-kea-docredhat-upgrade-kea-hooksredhat-upgrade-kea-hooks-debuginforedhat-upgrade-kea-keamaredhat-upgrade-kea-keama-debuginforedhat-upgrade-kea-libsredhat-upgrade-kea-libs-debuginfo
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