Container-Optimized OS end of life: end of support by version
Google · Operating Systems
For Container-Optimized OS by Google, patchletter knows 12 support cycles. 8 of them have already ended and receive no more security updates. The next support window closes on 01/09/2026, that is in 5 days. The current version of Container-Optimized OS is cos-129-19506-299-148. The cycles come from the open endoflife.date project, last reconciled on 26/08/2026.
When does support end for which Container-Optimized OS 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 |
|---|---|---|---|
| cos-129LTS | cos-129-19506-299-148 | 552 days left | EOL 1 Mar 28 |
| cos-125LTS | cos-125-19216-532-123 | 370 days left | EOL 1 Sept 27 |
| cos-121LTS | cos-121-18867-528-65 | 186 days left | EOL 1 Mar 27 |
| cos-117LTS | cos-117-18613-675-56 | 5 days left | EOL in 5 days |
| cos-113LTS | cos-113-18244-582-104 | 107 days ago | End of Life |
| cos-109LTS | cos-109-17800-570-50 | 337 days ago | End of Life |
| cos-105LTS | cos-105-17412-535-98 | 513 days ago | End of Life |
| cos-101LTS | cos-101-17162-528-64 | 675 days ago | End of Life |
| cos-97LTS | cos-97-16919-450-41 | 883 days ago | End of Life |
| cos-93LTS | cos-93-16623-461-42 | 1038 days ago | End of Life |
| cos-89LTS | cos-89-16108-798-22 | 1275 days ago | End of Life |
| cos-85LTS | cos-85-13310-1498-13 | 1456 days ago | End of Life |
Which Container-Optimized OS versions no longer receive security updates?
8 of 12 cycles have ended. If you run one of those lines, the vendor ships you no more patches — not even for critical flaws.
- Container-Optimized OS cos-113cos-113-18244-582-104
- Container-Optimized OS cos-109cos-109-17800-570-50
- Container-Optimized OS cos-105cos-105-17412-535-98
- Container-Optimized OS cos-101cos-101-17162-528-64
- Container-Optimized OS cos-97cos-97-16919-450-41
- Container-Optimized OS cos-93cos-93-16623-461-42
- Container-Optimized OS cos-89cos-89-16108-798-22
- Container-Optimized OS cos-85cos-85-13310-1498-13
Where does the EOL data for Container-Optimized OS come from?
From the open endoflife.date project, which collects vendors' official support commitments. patchletter reconciles the cycles daily; the Container-Optimized OS data is as of 26/08/2026. In case of doubt the vendor's own lifecycle page applies — patchletter deliberately stores no vendor full texts.
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