Introducing a Security Support Policy for the Kotlin Standard Library | The Kotlin Blog

Kotlin has introduced a security support policy for its standard library on the JVM, addressing the needs of organizations that require formal documentation for dependency reviews and compliance. This policy stipulates that each release line, such as 2.4.x, will receive security fixes for 18 months from the release date of its .0 version, with patches backported to all active lines within this support window. This structured approach ensures that security patches are released simultaneously across all supported lines, allowing teams to maintain their qualified production versions without needing to upgrade to newer release lines. While the Kotlin release process remains unchanged, with new releases being the recommended baseline, the security support window provides a crucial framework for environments requiring stability and compliance documentation, as security issues are assigned CVE identifiers and published via the JetBrains Security advisory process. This new policy solidifies Kotlin's commitment to providing predictable and stable compatibility, especially for large codebases in sensitive industries like banking and payment infrastructure.