- Implemented constrained impersonation as described in [KEP-5284](https://kep.k8s.io/5284). ([#134803](https://github.com/kubernetes/kubernetes/pull/134803), [@enj](https://github.com/enj)) [SIG API Machinery, Auth and Testing]

- Added a `.status.features.supplementalGroupsPolicy` field to Nodes. The field is true when the feature is implemented in the CRI implementation (KEP-3619). ([#125470](https://github.com/kubernetes/kubernetes/pull/125470), [@everpeace](https://github.com/everpeace)) [SIG API Machinery, Apps, Node and Testing]

`VolumeCapacityPriority` alpha feature was replaced with this, and the default behavior was changed. The `VolumeCapacityPriority` preferred a node with the least allocatable, but the `StorageCapacityScoring` preferred a node with the maximum allocatable. See [KEP-4049](https://github.com/kubernetes/enhancements/blob/master/keps/sig-storage/4049-storage-capacity-scoring-of-nodes-for-dynamic-provisioning/README.md) for details. ([#128184](https://github.com/kubernetes/kubernetes/pull/128184), [@cupnes](https:...

- Kubeadm: Exposed only the non-deprecated klog flags (-v and -vmodule), in line with KEP https://features.k8s.io/2845. ([#131647](https://github.com/kubernetes/kubernetes/pull/131647), [@carsontham](https://github.com/carsontham))

  Please see [the KEP](https://github.com/kubernetes/enhancements/tree/master/keps/sig-storage/1710-selinux-relabeling#story-3-cluster-upgrade) how we expect to warn users before any SELinux behavior changes and how they can opt-out before. Note that this field and feature...

- Supported `BackoffLimitPerIndex` in Jobs. ([#118009](https://github.com/kubernetes/kubernetes/pull/118009), [@mimowo](https://github.com/mimowo))
- The `IPTablesOwnershipCleanup` feature (KEP-3178) is now GA; kubelet no longer
  creates the `KUBE-MARK-DROP` chain (which has been unused for several releases)