CVE-2025-61909

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

MEDIUM

4.4

CVSS Score

Published: October 16, 2025 at 05:20 PM UTC

Updated: October 9, 2026 at 10:10 AM UTC

1 product affected across 1 vendorIcinga

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Severity

MEDIUM4.4

Exploit prediction

EPSS 0.2%

SSVC

No known exploit

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

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Icinga · Icinga

95%

2.10.0 ≤ v < 2.13.132.14.0 ≤ v < 2.14.7*2.15.0>=2.10.0, < 2.13.13>=2.14.0, < 2.14.7>=2.15.0, < 2.15.1

Affected range stops below 2.13.13, so it looks safe — our inference, not a vendor statement

Affected range stops below 2.14.7, so it looks safe — our inference, not a vendor statement

Affected range stops below 2.15.1, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (4)

x_refsource_CONFIRMPatchVendor Advisory

Source: cverecord

https://github.com/Icinga/icinga2/security/advisories/GHSA-pg6g-g99v-mw46

x_refsource_MISCIssue Tracking

Source: cverecord

https://github.com/Icinga/icinga2/issues/10527

x_refsource_MISCPatch

Source: cverecord

https://github.com/Icinga/icinga2/commit/51ec73cbd922a76fc0f60e1d8d33acd7caa5d587

x_refsource_MISCRelease Notes

Source: cverecord

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

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

4.4MEDIUM[email protected]

Attack Vector: LOCAL
Complexity: LOW
Privileges: HIGH
User Interaction: NONE
Scope: UNCHANGED
Confidentiality: NONE
Integrity: NONE
Availability: HIGH

Vector?

Quick Info

StatusANALYZED

CWE

CWE-250

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