- `kubeadm`: updated warning message when swap space is detected. When swap is
  active on Linux, `kubeadm` explains that swap is supported for cgroup v2 only and
  is beta but disabled by default. ([#120198](https://github.com/kubernetes/kubernetes/pull/120198), [@pacoxu](https://github.com/pacoxu))

- Fixed `kubectl explain` to show enum for field types if they were defined. ([#123023](https://github.com/kubernetes/kubernetes/pull/123023), [@ah8ad3](https://github.com/ah8ad3))

- The shorthand for --output flag in kubectl explain was accidentally deleted, but has been added back. ([#131962](https://github.com/kubernetes/kubernetes/pull/131962), [@superbrothers](https://github.com/superbrothers)) [SIG CLI]

- Eviction requests for pods that have a non-zero DeletionTimestamp will always succeed ([#91342](https://github.com/kubernetes/kubernetes/pull/91342), [@michaelgugino](https://github.com/michaelgugino)) [SIG Apps]
- Explain CRDs whose resource name are the same as builtin objects ([#89505](https://github.com/kubernetes/kubernetes/pull/89505), [@knight42](https://github.com/knight42)) [SIG API Machinery, CLI and Testing]

#### CustomResourceDefinition OpenAPI Publishing

OpenAPI specs for native types have long been served at /openapi/v2, and they are consumed by a number of components, notably kubectl client-side validation, kubectl explain and OpenAPI based client generators.

With Kubernetes 1.15 as beta, OpenAPI schemas are also published for CRDs, as long as their schemas are structural.

- The shorthand for --output flag in kubectl explain was accidentally deleted, but has been added back. ([#131993](https://github.com/kubernetes/kubernetes/pull/131993), [@superbrothers](https://github.com/superbrothers)) [SIG CLI]

### Other (Cleanup or Flake)

**Detection**:

Kubernetes Audit logs may indicate if the user name was misspelled to bypass the restriction placed on which user is a pod allowed to run as.

If you find evidence that this vulnerability has been exploited, please contact ******@****.***

**Additional Details**:

See the GitHub issue for more details: https://github.com/kubernetes/kubernetes/issues/112192 

**Acknowledgements**:

### Detection

Kubernetes Audit logs may indicate if the user name was misspelled to bypass the restriction placed on which user is a pod allowed to run as.

If you find evidence that this vulnerability has been exploited, please contact ******@****.***

#### Additional Details

See the GitHub issue for more details: https://github.com/kubernetes/kubernetes/issues/112192 

#### Acknowledgements

The precise details are relevant for Go implementations,
affect the specifics of error messages (such as whether
a compiler reports a type inference or other error),
and may explain why type inference fails in unusual code situations.
But by and large these rules can be ignored when writing Go code:
type inference is designed to mostly "work as expected",

### Detection

Kubernetes Audit logs may indicate if the user name was misspelled to bypass the restriction placed on which user is a pod allowed to run as.

If you find evidence that this vulnerability has been exploited, please contact ******@****.***

#### Additional Details

See the GitHub issue for more details: https://github.com/kubernetes/kubernetes/issues/112192 

#### Acknowledgements