Container-Optimized OS cos-109 · Version Status
Container-Optimized OS cos-109 End of Life Date
Container-Optimized OS cos-109 end-of-life date, support status, and CVE risk. Data from endoflife.date and official vendor documentation.
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Container-Optimized OS cos-109 is past end of life. This version no longer receives security patches. 272 days past EOL — migrate to a supported version immediately.
EOL Date
Sep 24, 2025
272 days past EOL
Latest Release
cos-109-17800-570-50
LTS release
Release Date
Sep 27, 2023
Container-Optimized OS cos-109 series
Attack Surface
10/30 Medium tier
CISA KEV Exposure
0/20 Not in KEV
Extended Support
0/10 Available
EOL Risk Score™ — proprietary methodology by endoflife.ai. Factors: EOL recency, attack surface breadth, CISA KEV catalog presence, extended support availability. Updated at every build.
Methodology → ·
View score card →
Extended Support
Extended Container-Optimized OS cos-109 support is available
Commercial vendors offer security patches beyond EOL — compare your options.
Compare Options →
All Container-Optimized OS Versions
| Version | Latest | EOL Date | Status |
|---|
| cos-69 LTS |
cos-69-10895-385-0 |
Dec 1, 2019 |
EOL |
| cos-73 LTS |
cos-73-11647-656-0 |
Sep 5, 2020 |
EOL |
| cos-77 LTS |
cos-77-12371-1109-0 |
Apr 1, 2021 |
EOL |
| cos-81 LTS |
cos-81-12871-1317-8 |
Jan 10, 2022 |
EOL |
| cos-85 LTS |
cos-85-13310-1498-13 |
Sep 1, 2022 |
EOL |
| cos-89 LTS |
cos-89-16108-798-22 |
Mar 1, 2023 |
EOL |
| cos-93 LTS |
cos-93-16623-461-42 |
Oct 24, 2023 |
EOL |
| cos-97 LTS |
cos-97-16919-450-41 |
Mar 27, 2024 |
EOL |
What does Container-Optimized OS cos-109 end of life mean?
When Container-Optimized OS cos-109 reaches end of life, the maintainers stop issuing security patches for this version. CVEs discovered after the EOL date are publicly disclosed on the National Vulnerability Database with no patch available. Exploit code frequently appears on GitHub within days of disclosure.
The CVE blind spot: Most vulnerability scanners check for known CVEs but do not flag the ongoing accumulation of unpatched vulnerabilities in EOL software versions. Running Container-Optimized OS cos-109 past its EOL date creates a permanently growing attack surface that standard security tooling will not surface.
Migrate to Container-Optimized OS cos-129 or implement compensating controls — network segmentation, enhanced monitoring, restricted access — while migration is underway.
Frequently Asked Questions
When does Container-Optimized OS cos-109 reach end of life?
Container-Optimized OS cos-109 reached end of life on September 24, 2025. This version is no longer receiving security patches.
Is Container-Optimized OS cos-109 still supported?
No. Container-Optimized OS cos-109 reached end of life on September 24, 2025 and is no longer receiving security patches.
What should I upgrade to from Container-Optimized OS cos-109?
The recommended upgrade from Container-Optimized OS cos-109 is
Container-Optimized OS cos-129 — the latest actively supported version. Check the
Container-Optimized OS full timeline for all supported versions.
What are the security risks of running Container-Optimized OS cos-109 past EOL?
When Container-Optimized OS cos-109 reaches end of life, the maintainers stop issuing security patches. Any CVEs disclosed after the EOL date accumulate with no remediation path. Most vulnerability scanners do not flag this — it is the CVE blind spot. Organizations running EOL Container-Optimized OS should migrate immediately or implement compensating controls.