`PodSecurity` replaces the deprecated `PodSecurityPolicy` admission controller.
`PodSecurity` is an admission controller that enforces Pod Security Standards on Pods in a Namespace based on specific namespace labels that set the enforcement level.
In 1.23, the `PodSecurity` feature gate is enabled by default.

### Container Runtime Interface (CRI) v1 is default

The Kubelet now supports the CRI `v1` API, which is now the project-wide default.

- Fix raw block mode CSI `NodePublishVolume` stage miss pod info. ([#99069](https://github.com/kubernetes/kubernetes/pull/99069), [@phantooom](https://github.com/phantooom))
- Fix resource enforcement when using systemd cgroup driver ([#102147](https://github.com/kubernetes/kubernetes/pull/102147), [@kolyshkin](https://github.com/kolyshkin))

#### Node

- The deprecated kubelet security controls `AllowPrivileged`, `HostNetworkSources`, `HostPIDSources`, and `HostIPCSources` have been removed. Enforcement of these restrictions should be done through admission control (such as `PodSecurityPolicy`) instead. ([#77820](https://github.com/kubernetes/kubernetes/pull/77820), [@dims](https://github.com/dims))

  Added `validationActions` to `ValidatingAdmissionPolicyBinding`, enabling validation failures to be handled by any combination of the warn, audit and deny enforcement actions. ([#115973](https://github.com/kubernetes/kubernetes/pull/115973), [@jpbetz](https://github.com/jpbetz))

- Kube-apiserver: when the Alpha `UserNamespacesPodSecurityStandards` feature gate is enabled, Pod Security Admission enforcement of the baseline policy now allows `procMount: Unmasked` for user namespace pods that set `hostUsers: false`. ([#126163](https://github.com/kubernetes/kubernetes/pull/126163), [@haircommander](https://github.com/haircommander))

* 'none' can now be specified in KubeletConfiguration.EnforceNodeAllocatable (--enforce-node-allocatable) to explicitly disable enforcement. ([#59515](https://github.com/kubernetes/kubernetes/pull/59515), [@mtaufen](https://github.com/mtaufen))

* Fixed regression in initial kubectl exec terminal dimensions ([#51127](https://github.com/kubernetes/kubernetes/pull/51127), [@chen-anders](https://github.com/chen-anders))

* Fixed a bug in the API server watch cache, which could cause a missing watch event immediately after cache initialization. ([#49992](https://github.com/kubernetes/kubernetes/pull/49992), [@liggitt](https://github.com/liggitt))

- Fix removing pods from podTopologyHints mapping ([#101892](https://github.com/kubernetes/kubernetes/pull/101892), [@aheng-ch](https://github.com/aheng-ch)) [SIG Node]