- `kubeadm`: a separate "super-admin.conf" file is now deployed. The User in `admin.conf` is now bound to a new RBAC Group `kubeadm:cluster-admins` that has `cluster-admin` `ClusterRole` access. The User in `super-admin.conf` is now bound to the `system:masters` built-in super-powers / break-glass Group that can bypass RBAC. Before this change, the default `admin.conf` was bound to `system:masters` Group, which was undesired. Executing `kubeadm...

- Deprecate the default service IP CIDR. The previous default was `10.0.0.0/24` which will be removed in 6 months/2 releases. Cluster admins must specify their own desired value, by using `--service-cluster-ip-range` on kube-apiserver. ([#81668](https://github.com/kubernetes/kubernetes/pull/81668), [@darshanime](https://github.com/darshanime))

### **Security**
#### Admission Control
* [alpha] Add [extensible external admission control](https://kubernetes.io/docs/admin/extensible-admission-controllers/).

#### TLS Bootstrapping
* [alpha] Rotation of the server TLS certificate on the kubelet. See [TLS bootstrapping - approval controller](https://kubernetes.io/docs/admin/kubelet-tls-bootstrapping/#approval-controller).

- DRA: Starting Kubernetes 1.33, only users with access to an admin namespace with the `kubernetes.io/dra-admin-access` label are authorized to create ResourceClaim or ResourceClaimTemplate objects with the `adminAccess` field in this admin namespace if they want to and only they can reference these ResourceClaims or ResourceClaimTemplates in their pod or deployment specs. ([#130225](https://github...

There is no mitigation from this issue.  Cluster admins should take care to secure aggregated API servers and should not grant access to mutate `APIService`s to untrusted parties.

**Affected Versions**:
  - kube-apiserver v1.25.0
  - kube-apiserver v1.24.0 - v1.24.4

- CSIServiceAccountToken graduates to Beta and enabled by default. ([#99298](https://github.com/kubernetes/kubernetes/pull/99298), [@zshihang](https://github.com/zshihang))

* Fixed error where config map for Metadata Agent was not created by addon manager. ([#62909](https://github.com/kubernetes/kubernetes/pull/62909), [@kawych](https://github.com/kawych))
* Fixed permissions to allow statefulset scaling for admins, editors, and viewers ([#62336](https://github.com/kubernetes/kubernetes/pull/62336), [@deads2k](https://github.com/deads2k))

- GPU metrics provided by kubelet are now disabled by default. ([#95184](https://github.com/kubernetes/kubernetes/pull/95184), [@RenaudWasTaken](https://github.com/RenaudWasTaken))

* The kubelet API is now secured, only cluster admins are allowed to access it.
* Insecure access to the API Server over `localhost:8080` is now disabled.
* The control plane components now talk securely to each other. The API Server talks securely to the kubelets in the cluster.

- DRA: Starting with Kubernetes 1.34, the alpha-level `resource.k8s.io/admin-access` label has been updated to `resource.kubernetes.io/admin-access`. Admins using the alpha feature and updating from 1.33 can set both labels, upgrade, then remove `resource.k8s.io/admin-access` when no downgrade is going to happen anymore. ([#131996](https://github.com/kubernetes/kubernetes/pull/131996), [@ritazh](https://github.com/ritazh))...