CVE-2025-40779 – Kea DHCPv4 Assertion Failure Vulnerability

The following table lists the changes that have been made to the
CVE-2025-40779 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution
of a vulnerability, and for identifying the most recent changes that may
impact the vulnerability’s severity, exploitability, or other characteristics.

  • New CVE Received
    by [email protected]

    Aug. 27, 2025

    Action Type Old Value New Value
    Added 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.
    Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
    Added CWE CWE-476
    Added Reference https://kb.isc.org/docs/cve-2025-40779
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