- Add feature gate `MutatingAdmissionPolicy` for enabling mutation policy in admission chain. ([#123425](https://github.com/kubernetes/kubernetes/pull/123425), [@cici37](https://github.com/cici37)) [SIG API Machinery]

### API Change

- 'A new `preEnqueue` extension point was added to scheduler's component config
  `v1beta2/v1beta3/v1`.'

</p>

<p>
Examples:
</p>

<pre>
var a = [...]int{0, 1, 2, 3, 4, 5, 6, 7}
var s = make([]int, 6)
var b = make([]byte, 5)
n1 := copy(s, a[0:])            // n1 == 6, s is []int{0, 1, 2, 3, 4, 5}
n2 := copy(s, s[2:])            // n2 == 4, s is []int{2, 3, 4, 5, 4, 5}
n3 := copy(b, "Hello, World!")  // n3 == 5, b is []byte("Hello")
</pre>


<h3 id="Clear">Clear</h3>

<p>

- Fixed a bug where `events/v1` `Events` with similar event type and reporting instance were not aggregated by `client-go`. ([#112365](https://github.com/kubernetes/kubernetes/pull/112365), [@dgrisonnet](https://github.com/dgrisonnet))

- Added warning for dup ports update/patching in pod's container ports and service ports. ([#113245](https://github.com/kubernetes/kubernetes/pull/113245), [@pacoxu](https://github.com/pacoxu))

  - [Changelog since v1.23.15](#changelog-since-v12315)
  - [Changes by Kind](#changes-by-kind-1)
    - [API Change](#api-change)
    - [Feature](#feature-1)
    - [Bug or Regression](#bug-or-regression-1)
  - [Dependencies](#dependencies-1)
    - [Added](#added-1)
    - [Changed](#changed-1)
    - [Removed](#removed-1)
- [v1.23.15](#v12315)
  - [Downloads for v1.23.15](#downloads-for-v12315)
    - [Source Code](#source-code-2)

- Fix problem in updating VolumeAttached in node status ([#112305](https://github.com/kubernetes/kubernetes/pull/112305), [@xing-yang](https://github.com/xing-yang)) [SIG Apps]