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 8 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 | 555 days left | EOL 28 Apr 28 |
| 2.4 | – | 381 days left | EOL 6 Nov 27 |
| 2.3 | – | 8 days left | EOL in 8 days |
| 2.2 | – | 332 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.
New Checkmk versions by email
Tick the product and patchletter reports new releases by email. The update email costs nothing, and one click stops it again. The warning 90, 30 and 7 days before support ends is part of patchletter Pro.