CVE-2025-61909 MEDIUM

CVE-2025-61909: Icinga 2 signals sent as root to processes based on PID file written by the Icinga 2 daemon user

Vendor Icinga
Product icinga2
Weakness CWE-250
Published October 16, 2025
Last update October 16, 2025
View on NVD All CVEs

CVSS base score

4.0/10
Attack vector Local
Attack complexity Low
Privileges required High
User interaction None
Confidentiality —
Integrity —

CVSS vector

CVSS:4.0/AV:L/AC:L/AT:P/PR:H/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:H

What the vulnerability does

01Description

Icinga 2 is an open source monitoring system. From 2.10.0 to before 2.15.1, 2.14.7, and 2.13.13, the safe-reload script (also used during systemctl reload icinga2) and logrotate configuration shipped with Icinga 2 read the PID of the main Icinga 2 process from a PID file writable by the daemon user, but send the signal as the root user. This can allow the Icinga user to send signals to processes it would otherwise not permitted to. A fix is included in the following Icinga 2 versions: 2.15.1, 2.14.7, and 2.13.13.

Key dates

02Disclosure timeline

October 16, 2025 CVE published
October 16, 2025 Record updated