Bug 2391373 (CVE-2025-40779) - CVE-2025-40779 kea: Kea crash upon interaction between specific client options and subnet selection
Summary: CVE-2025-40779 kea: Kea crash upon interaction between specific client option...
Keywords:
Status: NEW
Alias: CVE-2025-40779
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On: 2392383
Blocks:
TreeView+ depends on / blocked
 
Reported: 2025-08-27 21:01 UTC by OSIDB Bzimport
Modified: 2025-09-16 18:50 UTC (History)
1 user (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed:
Embargoed:

Attachments (Terms of Use)

Description OSIDB Bzimport 2025-08-27 21:01:21 UTC 
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.
Note You need to log in before you can comment on or make changes to this bug.