CRI-O
Open Container Initiative-based implementation of Kubernetes Container
...Patch releases (1.x.z) for Kubernetes are not in sync with those from CRI-O, because they are scheduled for each month, whereas CRI-O provides them only if necessary. If a Kubernetes release goes End of Life, then the corresponding CRI-O version can be considered in the same way. This means that CRI-O also follows the Kubernetes n-2 release version skew policy when it comes to feature graduation, deprecation or removal. This also applies to features that are independent of Kubernetes. Nevertheless, feature backports to supported release branches, which are independent from Kubernetes or other tools like cri-tools, are still possible. ...