Kotlin End of Life (EOL) Dates & Support Timeline

Q: What is the latest supported version of Kotlin?

The latest active version of Kotlin is 2.3.21. Always verify against the table above as support windows can change.

Complete end-of-life dates, support windows, and security status for all Kotlin versions. Data sourced from endoflife.date and official vendor documentation. Updated at every deploy.

Latest Active

2.3.21

2.3 series

Next EOL

—

None upcoming

Active Versions

of 11 total

EOL Versions

no longer patched

Release Cycle Timeline

■ EOL ■ Warning ■ Active ┊ Today

All Versions

Version	Latest Release	Release Date	EOL Date	Days	Status
1.3	1.3.72	Oct 29, 2018	Aug 14, 2020	2094 days past EOL	EOL
1.4	1.4.32	Aug 14, 2020	Apr 26, 2021	1839 days past EOL	EOL
1.5	1.5.32	Apr 26, 2021	Nov 29, 2021	1622 days past EOL	EOL
1.6	1.6.21	Nov 15, 2021	Jun 9, 2022	1430 days past EOL	EOL
1.7	1.7.22	Jun 9, 2022	Dec 28, 2022	1228 days past EOL	EOL
1.8	1.8.22	Dec 28, 2022	Jul 6, 2023	1038 days past EOL	EOL
1.9	1.9.25	Jul 6, 2023	May 21, 2024	718 days past EOL	EOL
2.0	2.0.21	May 21, 2024	Nov 27, 2024	528 days past EOL	EOL
2.1	2.1.21	Nov 27, 2024	Jun 23, 2025	320 days past EOL	EOL
2.2	2.2.21	Jun 23, 2025	Dec 16, 2025	144 days past EOL	EOL
2.3	2.3.21	Dec 16, 2025	Already EOL	Supported	Active

What does Kotlin end of life mean for your organization?

When a Kotlin version 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 Kotlin 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.

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Frequently Asked Questions

What is the end-of-life date for Kotlin?

See the full table above for all Kotlin version EOL dates.

What is the latest supported version of Kotlin?

The latest active version of Kotlin is 2.3.21. Always verify against the table above as support windows can change.

What happens when Kotlin reaches end of life?

When Kotlin reaches end of life, the vendor stops issuing security patches. Any CVEs disclosed after the EOL date accumulate indefinitely with no patch path — creating an ever-growing attack surface that most vulnerability scanners do not flag.

How do I check if I'm running an EOL version of Kotlin?

Check your current version against the table above. If your version's EOL date has passed, you are running unsupported software. You can also use the endoflife.ai Stack Scanner to check your entire dependency file at once.

Is there extended support available for EOL Kotlin versions?

Some vendors offer extended support for EOL software. Contact the original vendor or check with enterprise support providers for options.

Kotlin End of Life (EOL) Dates & Support Timeline

What does Kotlin end of life mean for your organization?

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