Checkmk end of life: end of support by version
Checkmk GmbH · Monitoring & ITSM
For Checkmk by Checkmk GmbH, patchletter knows 4 support cycles. One of them has already ended and receives no more security updates. The next support window closes on 29/10/2026, that is in 54 days. The current version of Checkmk is 2.5.0. The cycles come from the open endoflife.date project, last reconciled on 04/09/2026.
When does support end for which Checkmk version?
A cycle is a maintained version line. Where a date is given, support ends on that day — after it the vendor ships no more security updates for that line.
| Cycle | Latest version | End of support | Status |
|---|---|---|---|
| 2.5 | 2.5.0p12 | 601 days left | EOL 28 Apr 28 |
| 2.4 | – | 427 days left | EOL 6 Nov 27 |
| 2.3 | – | 54 days left | EOL in 54 days |
| 2.2 | – | 286 days ago | End of Life |
Which Checkmk versions no longer receive security updates?
1 of 4 cycles have ended. If you run one of those lines, the vendor ships you no more patches — not even for critical flaws.
- Checkmk 2.2
Where does the EOL data for Checkmk come from?
From the open endoflife.date project, which collects vendors' official support commitments. patchletter reconciles the cycles daily; the Checkmk data is as of 04/09/2026. In case of doubt the vendor's own lifecycle page applies — patchletter deliberately stores no vendor full texts.
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