KKP versions are expressed as x.y.z, where x is the major version, y is the minor version, and z is the patch version.
KKP follows the Kubernetes release model and cycle, though for practical reasons releases are a bit delayed to ensure compatibility with Kubernetes. In general, the latest three minor versions of KKP are supported, i.e. 2.21, 2.20 and 2.19. With the release of a new minor KKP version, support for the oldest supported KKP version is dropped.