CVE-2025-40779

Kea crash upon interaction between specific client options and subnet selection

CVSS 7.5 HIGHEPSS 0.5%CWE-476

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.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Produtos afetados

ISC · Kea

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Referências

https://kb.isc.org/docs/cve-2025-40779 http://www.openwall.com/lists/oss-security/2025/08/27/1