CVE-2025-40779

HIGH

7.5

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.

CVE Details

CVSS v3.1 Score7.5

SeverityHIGH

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

Attack VectorNETWORK

ComplexityLOW

Privileges RequiredNONE

User InteractionNONE

Published8/27/2025

Last Modified11/4/2025

Sourcenvd

Honeypot Sightings0

Weaknesses (CWE)

CWE-476

References

https://kb.isc.org/docs/cve-2025-40779(security-officer@isc.org)

http://www.openwall.com/lists/oss-security/2025/08/27/1(af854a3a-2127-422b-91ae-364da2661108)

IOC Correlations

No correlations recorded

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