Kotlin 2.3 · Version Status
Kotlin 2.3 End of Life Date
Kotlin 2.3 end-of-life date, support status, and CVE risk. Data from endoflife.date and official vendor documentation.
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Kotlin 2.3 is actively supported. EOL date: Already EOL.
EOL Date
Already EOL
Supported
Latest Release
2.3.21
Standard release
Release Date
Dec 16, 2025
Kotlin 2.3 series
| Version | Latest | EOL Date | Status |
|---|
| 1.3 |
1.3.72 |
Aug 14, 2020 |
EOL |
| 1.4 |
1.4.32 |
Apr 26, 2021 |
EOL |
| 1.5 |
1.5.32 |
Nov 29, 2021 |
EOL |
| 1.6 |
1.6.21 |
Jun 9, 2022 |
EOL |
| 1.7 |
1.7.22 |
Dec 28, 2022 |
EOL |
| 1.8 |
1.8.22 |
Jul 6, 2023 |
EOL |
| 1.9 |
1.9.25 |
May 21, 2024 |
EOL |
| 2.0 |
2.0.21 |
Nov 27, 2024 |
EOL |
What does Kotlin 2.3 end of life mean?
When Kotlin 2.3 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 Kotlin 2.3 past its EOL date creates a permanently growing attack surface that standard security tooling will not surface.
Migrate to Kotlin 2.3 or implement compensating controls — network segmentation, enhanced monitoring, restricted access — while migration is underway.
Frequently Asked Questions
When does Kotlin 2.3 reach end of life?
Kotlin 2.3 has already reached end of life.
Is Kotlin 2.3 still supported?
Yes, Kotlin 2.3 is currently supported. The EOL date is Already EOL.
What should I upgrade to from Kotlin 2.3?
The recommended upgrade from Kotlin 2.3 is
Kotlin 2.3 — the latest actively supported version. Check the
Kotlin full timeline for all supported versions.
What are the security risks of running Kotlin 2.3 past EOL?
When Kotlin 2.3 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 Kotlin should migrate immediately or implement compensating controls.