- The `system-node-critical` and `system-cluster-critical` priority classes are now limited to the `kube-system` namespace by the `PodPriority` admission plugin (matching changes in 1.11.1+). ([#65593](https://github.com/kubernetes/kubernetes/pull/65593), [@bsalamat](https://github.com/bsalamat)) Courtesy of...

`settings/v1alpha1`, and `scheduling/v1alpha1` APIs are disabled by default.

* The `system:node` role is no longer automatically granted to the `system:nodes` group in new clusters. The role gives broad read access to resources, including secrets and configmaps. Use the `Node` authorization mode to authorize the nodes in new clusters. To continue providing the `system:node` role to the members of the `system:nodes` group, create an installation-specific `ClusterRoleBinding` in the installation....

- Migrated `pod-security-admission` to use [contextual logging](https://k8s.io/docs/concepts/cluster-administration/system-logs/#contextual-logging). ([#114471](https://github.com/kubernetes/kubernetes/pull/114471), [@Namanl2001](htt...

- Upon successful authorization check, an impersonated user is added to the system:authenticated group.
  system:anonymous when impersonated is added to the system:unauthenticated group. ([#94410](https://github.com/kubernetes/kubernetes/pull/94410), [@tkashem](https://github.com/tkashem)) [SIG API Machinery and Testing]

- Upon successful authorization check, an impersonated user is added to the system:authenticated group.
  system:anonymous when impersonated is added to the system:unauthenticated group. ([#94409](https://github.com/kubernetes/kubernetes/pull/94409), [@tkashem](https://github.com/tkashem)) [SIG API Machinery and Testing]

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