CVE-2025-61909: Icinga 2 is an open source monitoring system

Routine

MEDIUM 4.4UPGRADE

CVE-2025-61909 is a medium-severity flaw (CVSS 4.4) affecting icinga. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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 inclu

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	4.4 (Medium)
Attack vector	Local
Attack complexity	Low
Privileges needed	High
User interaction	None
EPSS exploit chance	0.2% (top 88%)
CISA exploited list	No
Weakness	CWE-250
Published	2025-10-16
Last modified	2026-10-09

Publisher (CNA): GitHub, Inc. · Vendor: icinga

Last updated 2026-10-09 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2025-10-16 18:15 UTCPublished CVE record published
2026-10-09 10:10 UTCUpdated Record last modified

icinga icinga UPGRADE

Affected: >= 2.10.0 and < 2.13.13 · >= 2.14.0 and < 2.14.7 · 2.15.0

Fixed in: 2.13.13, 2.14.7

Safe to downgrade to: a release before 2.10.0

1. Check installed version

apt-cache policy icinga || rpm -q icinga || icinga --version

2. UPGRADE to 2.13.13 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade icinga

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade icinga

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

3. If no update is available yet, DOWNGRADE to a release before 2.10.0 (Debian / Ubuntu)

apt-cache madison icinga sudo apt install icinga=<VERSION_BEFORE_2.10.0> sudo apt-mark hold icinga

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list icinga sudo dnf downgrade icinga-<VERSION_BEFORE_2.10.0> sudo dnf versionlock add icinga

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2025-61909?

icinga: upgrade to 2.13.13, 2.14.7. Exact commands for each OS are on this page.

Is CVE-2025-61909 being exploited?

CVE-2025-61909 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2025-61909 affect?

CVE-2025-61909 affects icinga. Severity is medium (CVSS 4.4). 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 I

How urgent is CVE-2025-61909?

Priority 18/100. No elevated risk signals yet.

Related CVEs

CVE-2025-61908 MEDIUM 6.5 UPGRADE Icinga 2 is an open source monitoring system
CVE-2025-61907 MEDIUM 6.5 UPGRADE Icinga 2 is an open source monitoring system
CVE-2026-24413 MEDIUM 5.5 UPGRADE Icinga 2 is an open source monitoring system
CVE-2025-48057 CRITICAL 9.8 UPGRADE Icinga 2 is a monitoring system which checks the availability of network resources, notifies users of outages,
CVE-2024-49369 CRITICAL 9.8 UPGRADE MITIGATE Icinga is a monitoring system which checks the availability of network resources, notifies users of outages, a

References

← Back to latest CVEs