CVE-2025-61908: Icinga 2 is an open source monitoring system

Routine

MEDIUM 6.5UPGRADE

CVE-2025-61908 is a medium-severity flaw (CVSS 6.5) 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, when creating an invalid reference, such as a reference to null, dereferencing results in a segmentation fault. This can be used by any API user with access to an API endpoint that allows specifying a filter expression to crash the Icinga 2 daemon. A fix is included in the following Icinga 2 versions: 2.15.1, 2.14.7, and 2.13.13.

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	6.5 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.5% (top 55%)
CISA exploited list	No
Weakness	CWE-476
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 and < 2.15.1

Fixed in: 2.13.13, 2.14.7, 2.15.1

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-2025-61908?

icinga: upgrade to 2.13.13, 2.14.7, 2.15.1. Exact commands for each OS are on this page.

Is CVE-2025-61908 being exploited?

CVE-2025-61908 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-2025-61908 affect?

CVE-2025-61908 affects icinga. Severity is medium (CVSS 6.5). Icinga 2 is an open source monitoring system. From 2.10.0 to before 2.15.1, 2.14.7, and 2.13.13, when creating an invalid reference, such as a reference to null, dereferencing results in a segmentation fault. This can be used by any API use

How urgent is CVE-2025-61908?

Priority 34/100. No elevated risk signals yet.

Related CVEs

CVE-2025-61907 MEDIUM 6.5 UPGRADE Icinga 2 is an open source monitoring system
CVE-2025-61909 MEDIUM 4.4 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

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