## API Changes
- CustomResourceDefinitions now validate documented API semantics of `x-kubernetes-list-type` and `x-kubernetes-map-type` atomic to reject non-atomic sub-types. ([#84722](https://github.com/kubernetes/kubernetes/pull/84722), [@sttts](https://github.com/sttts))

- SSA treats certain structs as atomic ([#100684](https://github.com/kubernetes/kubernetes/pull/100684), [@Jefftree](https://github.com/Jefftree)) [SIG API Machinery, Auth, Node and Storage]

For initial installations, see the [Setup topics][] in the Kubernetes
documentation.

To upgrade to this release from a previous version, take any actions required
[Before Upgrading](#before-upgrading).

For more information about the release and for the latest documentation,
see the [Kubernetes documentation](https://kubernetes.io/docs/home/).

[Setup topics]: https://kubernetes.io/docs/setup/pick-right-solution/

- github.com/opencontainers/runc: [v1.1.10 → v1.1.12](https://github.com/opencontainers/runc/compare/v1.1.10...v1.1.12)
- go.uber.org/atomic: v1.10.0 → v1.7.0
- go.uber.org/goleak: v1.2.1 → v1.3.0
- go.uber.org/zap: v1.19.0 → v1.26.0
- golang.org/x/crypto: v0.14.0 → v0.21.0
- golang.org/x/mod: v0.12.0 → v0.15.0
- golang.org/x/net: v0.17.0 → v0.23.0

- github.com/opentracing/opentracing-go: [v1.1.0](https://github.com/opentracing/opentracing-go/tree/v1.1.0)
- go.etcd.io/etcd/client/v2: v2.305.21
- go.etcd.io/etcd/raft/v3: v3.5.21
- go.uber.org/atomic: v1.7.0
- golang.org/x/lint: d0100b6
- google.golang.org/appengine: v1.4.0
- google.golang.org/genproto: ef43131
- honnef.co/go/tools: ea95bdf
- sigs.k8s.io/structured-merge-diff/v4: v4.6.0

- The API server now re-uses data encryption keys while the kms v2 plugin key ID is stable.  Data encryption keys are still randomly generated on server start but an atomic counter is used to prevent nonce collisions. ([#116155](https://github.com/kubernetes/kubernetes/pull/116155), [@enj](https://github.com/enj))

* Fixes a performance issue when using server-side apply with objects with very large atomic maps. ([#85462](https://github.com/kubernetes/kubernetes/pull/85462), [@jennybuckley](https://github.com/jennybuckley))

- Changed how the API server handles updates to `.spec.defaultBackend` of Ingress objects.

- Changed ownership semantics of PersistentVolume's spec.claimRef from `atomic` to `granular`. ([#110495](https://github.com/kubernetes/kubernetes/pull/110495), [@alexzielenski](https://github.com/alexzielenski))

- Server Side Apply now treats LabelSelector fields as atomic (meaning the entire selector is managed by a single writer and updated together), since they contain interrelated and inseparable fields that do not merge in intuitive ways. ([#93901](https://github.com/kubernetes/kubernetes/pull/93901), [@jpbetz...