[FastAPI docs for OpenAPI](https://fastapi.tiangolo.com/how-to/extending-openapi/).
        """
        if not self.openapi_schema:
            self.openapi_schema = get_openapi(
                title=self.title,
                version=self.version,
                openapi_version=self.openapi_version,
                summary=self.summary,
                description=self.description,

- Kube-apiserver: Fixed a possible panic validating a custom resource whose `CustomResourceDefinition` indicates a status subresource exists, but which does not define a `status` property in the `openAPIV3Schema`. ([#133721](https://github.com/kubernetes/kubernetes/pull/133721), [@fusida](https://github.com/fusida)) [SIG API Machinery, Apps, Architecture, Auth, Autoscaling, CLI, Cloud Provider, Cluster Lifecycle, Etcd, Instrumentation, Network, Node,...

- Bumped distroless-iptables to 0.4.1 based on Go `1.21.3`. ([#121871](https://github.com/kubernetes/kubernetes/pull/121871), [@cpanato](https://github.com/cpanato))
- CEL can now correctly handle a CRD `openAPIV3Schema` that has neither `Properties` nor `AdditionalProperties`. ([#121459](https://github.com/kubernetes/kubernetes/pull/121459), [@jiahuif](https://github.com/jiahuif))

  - `spec.conversion.conversionReviewVersions` is moved to `spec.conversion.webhook.conversionReviewVersions` in v1
  - `spec.versions[*].schema.openAPIV3Schema` is now required when creating v1 CustomResourceDefinitions

- Kube-apiserver: fix a possible panic validating a custom resource whose CustomResourceDefinition indicates a status subresource exists, but which does not define a `status` property in the `openAPIV3Schema` ([#135362](https://github.com/kubernetes/kubernetes/pull/135362), [@fusida](https://github.com/fusida)) [SIG API Machinery]