postmarketOS 21.03 End of Life
Support dates and upgrade guidance — rebuilt from live data.
postmarketOS 21.03 reached end of life on 4 Aug 2021. It no longer receives security fixes.
Support timeline
Official dates from the postmarketOS release process.
| Milestone | Date | Status |
|---|---|---|
| Initial release | 31 Mar 2021 | 5y 6mo ago |
| Security Support ended | 4 Aug 2021 | 5y 2mo ago |
| Latest release | — | final |
Where to go from 21.03
Recommended target: postmarketOS 26.06 (supported until 31 Jan 2027).
The newest actively supported branch is postmarketOS 26.06 (latest release ).
Frequently asked questions
Is postmarketOS 21.03 still safe to use?
postmarketOS 21.03 reached end of life on 4 Aug 2021, 1,888 days ago, and is no longer covered by standard support. Running it means no guaranteed security fixes.
Can I still download postmarketOS 21.03?
Yes — the final release (21.03) generally remains available from vendor archives and OS package mirrors, but installing it means running software with known, unpatched vulnerabilities.
What should I upgrade postmarketOS 21.03 to?
Upgrade to postmarketOS 26.06, the newest actively supported branch (supported until 31 Jan 2027).