- Kube-apiserver: Promoted the `StructuredAuthenticationConfiguration` feature gate to GA. ([#131916](https://github.com/kubernetes/...

- The default delegating authorization options now allow unauthenticated access to healthz, readyz, and livez.  A system:masters user connecting to an authz delegator will not perform an authz check. ([#98325](https://github.com/kubernetes/kubernetes/pull/98325), [@deads2k](https://github.com/deads2k)) [SIG API Machinery, Auth, Cloud Provider and Scheduling]

- DRA: new API and several new features ([#125488](https://github.com/kubernetes/kubernetes/pull/125488), [@pohly](https://github.com/pohly)) [SIG API Machinery, Apps, Auth, CLI, Cluster Lifecycle, Etcd, Node, Release, Scheduling, Storage and Testing]

### SIG Auth

Work this cycle focused on graduating existing functions, and on making security functions more understandable for users.

- The following features are unconditionally enabled and the corresponding `--feature-gates` flags have been removed: `PodPriority`,...

### API Change

- SELinuxChangePolicy and SELinuxMount graduated to Beta. SELinuxMount stays off by default. ([#130544](https://github.com/kubernetes/kubernetes/pull/130544), [@jsafrane](https://github.com/jsafrane)) [SIG Auth, Node and Storage]

**Note**: This only impacts the cluster if the ServiceAccount admission plugin is used (most cluster should have this on by default as recommended in https://kubernetes.io/docs/reference/access-authn-authz/admission-controllers/#serviceaccount), the `kubernetes.io/enforce-mountable-secrets` annotation is used by a service account (this annotation is not added by default), and Pods are using ephemeral containers.

- Disallow `k8s.io` and `kubernetes.io` namespaced extra key in structured authentication configuration. ([#126553](https://github.com/kubernetes/kubernetes/pull/126553), [@aramase](https://github.com/aramase)) [SIG Auth]

### API Change

- Add auth API to get self subject attributes (new selfsubjectreviews API is added). 
  The corresponding command for kubctl is provided - `kubectl auth whoami`. ([#111333](https://github.com/kubernetes/kubernetes/pull/111333), [@nabokihms](https://github.com/nabokihms)) [SIG API Machinery, Auth, CLI and Testing]