Checkmk 2.4 End of Life
Support dates and upgrade guidance — rebuilt from live data.
Supported
Checkmk 2.4 is actively supported. It reaches end of life on 6 Nov 2027.
454 days of security support left
2.4 latest release
50% of this branch's supported lifetime has elapsed — 6 May 2025 → 6 Nov 2027.
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Support timeline
Official dates from the Checkmk release process.
| Milestone | Date | Status |
|---|---|---|
| Initial release | 6 May 2025 | — |
| End of life (scheduled) | 6 Nov 2027 | in 454 days |
| Latest release | 2.4 · 6 May 2025 | current |
How much runway a newer branch buys
Moving to Checkmk 2.5 extends security support by about 174 days.
| Branch | End of life | Days left | vs 2.4 |
|---|---|---|---|
| Checkmk 2.5 | 28 Apr 2028 | 628 | +174 days |
| Checkmk 2.4 | 6 Nov 2027 | 454 | this branch |
| Checkmk 2.3 | 29 Oct 2026 | 81 | -373 days |
Frequently asked questions
When does Checkmk 2.4 reach end of life?
Checkmk 2.4 reaches end of life on 6 Nov 2027 — 454 days from now. After that date it receives no security fixes.
Is Checkmk 2.4 still supported?
Yes. Checkmk 2.4 is currently maintained. Latest release: 2.4, published 6 May 2025.
What happens when Checkmk 2.4 reaches end of life?
Security fixes stop. After 6 Nov 2027 this branch receives no further updates under standard support.
How long do I have to upgrade from Checkmk 2.4?
454 days. Moving to Checkmk 2.5 instead buys roughly 174 more days of security support.