PT-2025-34937 · Kea+2 · Kea+2

Published 2025-01-01 · Updated 2026-03-11 · CVE-2025-40779

Positive Technologies (AI Summary)

CVSS v2.0

7.8

High

Base vector

AV:N/AC:L/Au:N/C:N/I:N/A:C

Name of the Vulnerable Software and Affected Versions: Kea versions 2.7.1 through 2.7.9 Kea version 3.0.0 Kea version 3.1.0

Description: If a DHCPv4 client sends a request with specific options and Kea fails to find an appropriate subnet for the client, the kea-dhcp4 process will abort with an assertion failure. This issue occurs only when the client request is unicast directly to Kea; broadcast messages do not cause the problem. A malicious or misconfigured DHCP client can crash the Kea DHCPv4 service by sending a single packet.

Recommendations: Update Kea to a version later than 3.1.0.

Fix

NULL Pointer Dereference

Assertion Failure

Weakness Enumeration

CWE-476

CWE-617

Related Identifiers

BDU:2025-12586

CVE-2025-40779

OPENSUSE-SU-2025:15499-1

OPENSUSE-SU-2026:20341-1

RHSA-2025:21006

Affected Products

Debian

Kea

Red Os

References · 25

• https://bdu.fstec.ru/vul/2025-12586 · Security Note
• https://ubuntu.com/security/CVE-2025-40779 · Vendor Advisory
• https://osv.dev/vulnerability/openSUSE-SU-2025:15499-1 · Vendor Advisory
• https://osv.dev/vulnerability/openSUSE-SU-2026:20341-1 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2025-40779 · Vendor Advisory
• https://kb.isc.org/docs/cve-2025-40779 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2025-40779 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2025-40779 · Security Note
• https://osv.dev/vulnerability/CVE-2025-40779 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2025-40779 · Security Note
• https://redos.red-soft.ru/support/secure · Note
• https://t.me/pentestingnews/67078 · Telegram Post
• https://suse.com/security/cve/CVE-2025-40779 · Note
• https://t.me/CVEtracker/31071 · Telegram Post
• https://twitter.com/CVEnew/status/1960803263445430449 · Twitter Post