- Fixed a bug where the CPU set allocated to an init container, with containerRestartPolicy of `Always`, were erroneously reused by a regular container. ([#119447](https://github.com/kubernetes/kubernetes/pull/119447), [@gjkim42](https://github.com/gjkim42)) [SIG Node and Testing]

- Kubeadm: Fixed a bug where the PublicKeysECDSA feature gate was not respected when generating kubeconfig files....

- Kubeadm: fix a regression where the KubeletConfiguration is not properly downloaded during "kubeadm upgrade"...

- Kubeadm: fix a bug where post upgrade to 1.18.x, nodes cannot join the cluster due to missing RBAC ([#89537](https://github.com/kubernetes/kubernetes/pull/89537), [@neolit123](https://github.com/neolit123)) [SIG Cluster Lifecycle]

* Requests with invalid credentials no longer match audit policy rules where users or groups are set, correcting a problem where authorized requests were getting through. ([#59398](https://github.com/kubernetes/kubernetes/pull/59398), [@CaoShuFeng](https://github.com/CaoShuFeng))

- Fix 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)) [SIG API Machinery and Instrumentation]

    *  - vSphere cloud provider (VCP) uses OS hostname and not vSphere Inventory VM Name.
    *    That means, now  VCP can handle cases where user changes VM inventory name.
    * - VCP can handle cases where VM migrates to other ESXi cluster or datacenter or vCenter.
    * The only requirement is the shared storage. VCP needs shared storage on all Node VMs.

* Upgrade to etcd client 3.3.17 to fix bug where etcd client does not parse IPv6 addresses correctly when members are joining, and to fix bug where failover on multi-member etcd cluster fails certificate check on DNS mismatch ([#83801](https://github.com/kubernetes/kubernetes/pull/83801), [@jpbetz](https://github.com/jpbetz))

- Fixed issue where there was no response or error from kubectl rollout status when there were no resources of specified kind. ([#117884](https://github.com/kubernetes/kubernetes/pull/117884), [@gxwilkerson33](https://github.com/gxwilkerson33)) [SIG CLI]

* Fixes issue where masquerade rules are flushed in GCE k8s clusters. ([#56728](https://github.com/kubernetes/kubernetes/pull/56728), [@dnardo](https://github.com/dnardo))