- Kubelet: close a loophole where static pods could reference arbitrary ResourceClaims. The pods created by the kubelet then don't run due to a sanity check, but such references shouldn't be allowed regardless. ([#131875](https://github.com/kubernetes/kubernetes/pull/131875), [@pohly](https://github.com/pohly)) [SIG Apps, Auth and Node]

- Added authorization check support to the CEL expressions of ValidatingAdmissionPolicy via a `authorizer`

- Enabled kube-apiserver support for `PodCertificateRequest` and `PodCertificate` projected volumes (behind the `PodCertificateRequest` feature gate). ([#128010](https://github.com/kubernetes/kubernetes/pull/128010), [@ahmedtd](https://github.com/ahmedtd)) [SIG API Machinery, Apps, Auth, Cloud Provider, Etcd, Node, Storage and Testing]

- Conflicting issuers between JWT authenticators and service account config are now detected and fail on API server startup.  Previously such a config would run but would be inconsistently effective depending on the credential. ([#123561](https://github.com/kubernetes/kubernetes/pull/123561), [@enj](https://github.com/enj)) [SIG API Machinery and Auth]

- 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]

- Removed `WindowsHostProcessContainers` feature-gate. ([#117570](https://github.com/kubernetes/kubernetes/pull/117570), [@marosset](https://github.com/marosset)) [SIG API Machinery, Apps, Auth, Node and Windows]

- Kubelet should reconcile `kubernetes.io/os` and `kubernetes.io/arch` labels on the node object. The side-effect of this is kubelet would deny admission to pod which has nodeSelector with label `kubernetes.io/os` or `kubernetes.io/arch` which doesn't match the underlying OS or arch on the host OS. 

- Adds support for CEL expressions to v1alpha1 AuthorizationConfiguration webhook matchConditions. ([#121223](https://github.com/kubernetes/kubernetes/pull/121223), [@ritazh](https://github.com/ritazh)) [SIG API Machinery and Auth]

- The `gcp` and `azure` auth plugins have been removed from client-go and kubectl. See https://github.com/Azure/kubelogin and https://cloud.google.com/blog/products/containers-kubernetes/kubectl-auth-changes-in-gke for details about the cloud-specific replacements. ([#110013](https://github.com/kubernetes/kubernetes/pull/110013), [@enj](https://github.com/enj)) [SIG API Machinery and Auth]

- Fix an ephemeral port exhaustion bug caused by improper connection management that occurred when a large number of objects were handled by kubectl while exec auth was in use. ([#112339](https://github.com/kubernetes/kubernetes/pull/112339), [@enj](https://github.com/enj)) [SIG API Machinery and Auth]