Container-Optimized OS End of Life (EOL) Dates & Support Timeline
Complete end-of-life dates, support windows, and security status for all Container-Optimized OS versions. Data sourced from endoflife.date and official vendor documentation. Updated at every deploy.
| Version | Latest Release | Release Date | EOL Date | Days | Status |
|---|---|---|---|---|---|
| cos-69 LTS | cos-69-10895-385-0 | Sep 18, 2018 | Dec 1, 2019 | 2396 days past EOL | EOL |
| cos-73 LTS | cos-73-11647-656-0 | Mar 25, 2019 | Sep 5, 2020 | 2117 days past EOL | EOL |
| cos-77 LTS | cos-77-12371-1109-0 | Sep 27, 2019 | Apr 1, 2021 | 1909 days past EOL | EOL |
| cos-81 LTS | cos-81-12871-1317-8 | Mar 27, 2020 | Jan 10, 2022 | 1625 days past EOL | EOL |
| cos-85 LTS | cos-85-13310-1498-13 | Sep 24, 2020 | Sep 1, 2022 | 1391 days past EOL | EOL |
| cos-89 LTS | cos-89-16108-798-22 | Apr 7, 2021 | Mar 1, 2023 | 1210 days past EOL | EOL |
| cos-93 LTS | cos-93-16623-461-42 | Oct 18, 2021 | Oct 24, 2023 | 973 days past EOL | EOL |
| cos-97 LTS | cos-97-16919-450-41 | Mar 29, 2022 | Mar 27, 2024 | 818 days past EOL | EOL |
| cos-101 LTS | cos-101-17162-528-64 | Sep 15, 2022 | Oct 21, 2024 | 610 days past EOL | EOL |
| cos-105 LTS | cos-105-17412-535-98 | Apr 3, 2023 | Apr 1, 2025 | 448 days past EOL | EOL |
| cos-109 LTS | cos-109-17800-570-50 | Sep 27, 2023 | Sep 24, 2025 | 272 days past EOL | EOL |
| cos-113 LTS | cos-113-18244-582-104 | Apr 15, 2024 | May 12, 2026 | 42 days past EOL | EOL |
| cos-117 LTS | cos-117-18613-613-56 | Oct 2, 2024 | Sep 1, 2026 | 70 days remaining | Warning |
| cos-121 LTS | cos-121-18867-381-177 | Apr 14, 2025 | Mar 1, 2027 | 251 days remaining | Active |
| cos-125 LTS | cos-125-19216-395-101 | Oct 9, 2025 | Sep 1, 2027 | 435 days remaining | Active |
| cos-129 LTS | cos-129-19506-224-36 | May 21, 2026 | Mar 1, 2028 | 617 days remaining | Active |
What does Container-Optimized OS end of life mean for your organization?
When a version of Container-Optimized OS reaches end of life, the maintainers stop issuing security patches. Vulnerabilities discovered after this date are publicly disclosed on the National Vulnerability Database, exploit code appears on GitHub, and your systems remain permanently exposed.
The CVE blind spot: Most vulnerability scanners check for known CVEs but do not flag the accumulation of unpatched vulnerabilities in EOL software. With a zero-day, nobody knows about the vulnerability. With EOL software, the vulnerability is public — listed, rated, and often weaponized — but no patch will ever exist. This is the most dangerous gap in enterprise security posture.
Organizations running EOL Container-Optimized OS should treat it as a vulnerability class in their risk register, apply compensating controls (network segmentation, enhanced monitoring, access restriction), and prioritize migration to a supported version.
Extended Support Options
If you cannot migrate immediately, extended support vendors provide continued security patches for EOL Container-Optimized OS versions. This is a bridge, not a permanent solution — plan your migration in parallel.
We work with vetted extended support vendors. Tell us what you need and we'll connect you with the right provider.
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