- Fixes bug where an incomplete OpenAPI V3 document can cause a nil-pointer crash.
  Ensures fallback to OpenAPI V2 endpoint for errors retrieving OpenAPI V3 document. ([#117918](https://github.com/kubernetes/kubernetes/pull/117918), [@seans3](https://github.com/seans3)) [SIG CLI]

- Patched a leak of a discovery document that would occur when an Aggregated APIService changed its Spec.Service field and did not change it back. ([#123517](https://github.com/kubernetes/kubernetes/pull/123517), [@Jefftree](https://github.com/Jefftree))

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- Fix race in alpha aggregated discovery handler
  Yes, discovery document will correctly return the resources for aggregated apiservers that do not implement aggregated disovery ([#115805](https://github.com/kubernetes/kubernetes/pull/115805), [@alexzielenski](https://github.com/alexzielenski)) [SIG API Machinery]