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Vulnerability · Published Oct 16, 2025 · Assigned by GitHub_M

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

Medium 4.0

In plain English

A medium-severity security flaw in icinga2 from Icinga. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 12% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 4.0)4.0Medium
Exploit odds (30 days)0.2%top 87.9% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official description

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.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12icinga2no fix listedDEBIAN-CVE-2025-61909
Debian:13icinga22.14.6-1+deb13u1DEBIAN-CVE-2025-61909
Debian:14icinga22.15.1-1DEBIAN-CVE-2025-61909
Ubuntu:22.04:LTSicinga2no fix listedUBUNTU-CVE-2025-61909
Ubuntu:24.04:LTSicinga2no fix listedUBUNTU-CVE-2025-61909
Ubuntu:25.10icinga2no fix listedUBUNTU-CVE-2025-61909
Ubuntu:26.04:LTSicinga2no fix listedUBUNTU-CVE-2025-61909

Affected products (as reported)

VendorProductVersions
Icinga icinga2 >=2.10.0, < 2.13.13>=2.14.0, < 2.14.7>=2.15.0, < 2.15.1

Weakness: CWE-250 · 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

References