Container-Optimized OS cos-101 · Version Status
Container-Optimized OS cos-101 End of Life Date
Container-Optimized OS cos-101 end-of-life date, support status, and CVE risk. Data reconciled from official vendor documentation and endoflife.date at every build; the source of each date is on the product page.
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Container-Optimized OS cos-101 is past end of life. This version no longer receives security patches. 767 days past EOL — migrate to a supported version immediately.
EOL Date
Oct 1, 2024
767 days past EOL
Latest Release
cos-101-17162-528-64
LTS release
Release Date
Sep 15, 2022
Container-Optimized OS cos-101 series
Where these dates come from
End of lifeOct 1, 2024endoflife.date (open dataset) · endoflife.datemedium · 1 source agrees ReleaseSep 15, 2022endoflife.date (open dataset) · endoflife.datemedium · 1 source agrees Confidence: high = two or more independent sources agree (the vendor's page read by our adapter, a person's check against the vendor, the dataset the date came from); medium = one; low = the vendor page disagrees or our last read is stale.
How we source dates.
Lifecycle detail
Container-Optimized OS cos-101 was released on September 15, 2022 and support ended on October 1, 2024 — a supported lifespan of 2 years and 1 month, in line with the 1 year and 11 months median for Container-Optimized OS LTS releases. It was a long-term support (LTS) release, so it received a longer patch window than the interim releases around it. Its latest release on record is cos-101-17162-528-64, published October 21, 2024 — 20 days after the published end-of-life date. It has been past its end-of-life date for 2 years and 1 month. 5 newer Container-Optimized OS releases have shipped since.
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-101 support options
Some vendors and third parties sell security patches beyond end of life; whether one covers this version varies. 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 |
Jun 1, 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 1, 2023 |
EOL |
| cos-97 LTS |
cos-97-16919-450-41 |
Apr 1, 2024 |
EOL |
What does Container-Optimized OS cos-101 end of life mean?
When Container-Optimized OS cos-101 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: A CVE-based scan does not show the ongoing accumulation of unpatched vulnerabilities in EOL software versions. Some scanners flag unsupported versions of common products, but coverage varies, and none of them give you the date in advance. Running Container-Optimized OS cos-101 past its EOL date creates a growing attack surface that a clean scan result does not rule out.
Migrate to Container-Optimized OS cos-133 or implement compensating controls — network segmentation, enhanced monitoring, restricted access — while migration is underway.
Frequently Asked Questions
When does Container-Optimized OS cos-101 reach end of life?
Container-Optimized OS cos-101 reached end of life on October 1, 2024. This version is no longer receiving security patches.
Is Container-Optimized OS cos-101 still supported?
No. Container-Optimized OS cos-101 reached end of life on October 1, 2024 and is no longer receiving security patches.
What should I upgrade to from Container-Optimized OS cos-101?
The recommended upgrade from Container-Optimized OS cos-101 is
Container-Optimized OS cos-133 — 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-101 past EOL?
Since Container-Optimized OS cos-101 reached end of life, the maintainers no longer issue security patches. Any CVEs disclosed after the EOL date accumulate with no vendor fix. A CVE-based scan does not show this — it is the CVE blind spot; some scanners flag unsupported versions of common products, but coverage varies and none give the date in advance. Organizations running EOL Container-Optimized OS should migrate immediately or implement compensating controls.