kea: If a DHCPv4 client sends a request with some specific options, and Kea fails to find an appropriate subnet for the cl...
CVE-2025-40779 is fixed in 5 products on 1 platform, first by RHSA-2025:21006, released August 27, 2025. It is not reported as exploited. Patch Radar priority: High.
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.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| kea · RHEL 10 | 3.0.1-1.el10_1 | RHSA-2025:21006 | Aug 27, 2025 |
| kea · ol 10 | 0:3.0.1-2.el10_1 | ELSA-2025-21006 | Dec 3, 2025 |
| kea · opensuse-leap 16.0 | 3.0.1-160000.1.1 | OPENSUSE-SU-2026:20341-1 | Mar 11, 2026 |
| kea-doc · ol 10 | 0:3.0.1-2.el10_1 | ELSA-2025-21006 | Dec 3, 2025 |
| kea-hooks · ol 10 | 0:3.0.1-2.el10_1 | ELSA-2025-21006 | Dec 3, 2025 |
| kea-keama · ol 10 | 0:3.0.1-2.el10_1 | ELSA-2025-21006 | Dec 3, 2025 |
| kea-libs · ol 10 | 0:3.0.1-2.el10_1 | ELSA-2025-21006 | Dec 3, 2025 |
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