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4.4
MEDIUM CVSS 3.1
CVE-2025-61909
Icinga 2 signals sent as root to processes based on PID file written by the Icinga 2 daemon user
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.

INFO

Published Date :

Oct. 16, 2025, 6:15 p.m.

Last Modified :

Oct. 29, 2025, 8:03 p.m.

Remotely Exploit :

No

Source :

[email protected]
Affected Products

The following products are affected by CVE-2025-61909 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Icinga icinga
: Total Affected Vendor : 1 | Products : 1
CVSS Scores
The Common Vulnerability Scoring System is a standardized framework for assessing the severity of vulnerabilities in software and systems. We collect and displays CVSS scores from various sources for each CVE.
Score Version Severity Vector Exploitability Score Impact Score Source
CVSS 3.1 MEDIUM [email protected]
CVSS 4.0 MEDIUM [email protected]
Solution
Update Icinga 2 to a patched version to correct PID file handling.
  • Update Icinga 2 to version 2.15.1 or later.
  • Apply patches for versions 2.14.7 or 2.13.13.
  • Ensure correct file permissions for PID files.
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2025-61909.

URL Resource
https://github.com/Icinga/icinga2/commit/51ec73cbd922a76fc0f60e1d8d33acd7caa5d587 Patch
https://github.com/Icinga/icinga2/issues/10527 Issue Tracking
https://github.com/Icinga/icinga2/security/advisories/GHSA-pg6g-g99v-mw46 Patch Vendor Advisory
https://icinga.com/blog/releasing-icinga-2-v2-15-1-2-14-7-and-2-13-13-and-icinga-db-web-v1-2-3-and-1-1-4 Release Notes
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2025-61909 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2025-61909 weaknesses.

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2025-61909 vulnerability anywhere in the article.

Results are limited to the first 20 news articles due to potential performance issues.

The following table lists the changes that have been made to the CVE-2025-61909 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • Initial Analysis by [email protected]

    Oct. 29, 2025

    Action Type Old Value New Value
    Added CVSS V3.1 AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
    Added CPE Configuration OR *cpe:2.3:a:icinga:icinga:*:*:*:*:*:*:*:* versions from (including) 2.10.0 up to (excluding) 2.13.13 *cpe:2.3:a:icinga:icinga:*:*:*:*:*:*:*:* versions from (including) 2.14.0 up to (excluding) 2.14.7 *cpe:2.3:a:icinga:icinga:2.15.0:*:*:*:*:*:*:*
    Added Reference Type GitHub, Inc.: https://github.com/Icinga/icinga2/commit/51ec73cbd922a76fc0f60e1d8d33acd7caa5d587 Types: Patch
    Added Reference Type GitHub, Inc.: https://github.com/Icinga/icinga2/issues/10527 Types: Issue Tracking
    Added Reference Type GitHub, Inc.: https://github.com/Icinga/icinga2/security/advisories/GHSA-pg6g-g99v-mw46 Types: Patch, Vendor Advisory
    Added Reference Type GitHub, Inc.: https://icinga.com/blog/releasing-icinga-2-v2-15-1-2-14-7-and-2-13-13-and-icinga-db-web-v1-2-3-and-1-1-4 Types: Release Notes
  • New CVE Received by [email protected]

    Oct. 16, 2025

    Action Type Old Value New Value
    Added 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.
    Added CVSS V4.0 AV:L/AC:L/AT:P/PR:H/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
    Added CWE CWE-250
    Added Reference https://github.com/Icinga/icinga2/commit/51ec73cbd922a76fc0f60e1d8d33acd7caa5d587
    Added Reference https://github.com/Icinga/icinga2/issues/10527
    Added Reference https://github.com/Icinga/icinga2/security/advisories/GHSA-pg6g-g99v-mw46
    Added Reference https://icinga.com/blog/releasing-icinga-2-v2-15-1-2-14-7-and-2-13-13-and-icinga-db-web-v1-2-3-and-1-1-4
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
Vulnerability Scoring Details
Base CVSS Score: 4.0
Attack Vector
Attack Complexity
Attack Requirements
Privileges Required
User Interaction
VS Confidentiality
VS Integrity
VS Availability
SS Confidentiality
SS Integrity
SS Availability
Base CVSS Score: 4.4
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality Impact
Integrity Impact
Availability Impact