* Update debian-iptables and hyperkube-base images to include CVE fixes. ([#67365](https://github.com/kubernetes/kubernetes/pull/67365), [@ixdy](https://github.com/ixdy))
* Immediately close the other side of the connection when proxying. ([#67288](https://github.com/kubernetes/kubernetes/pull/67288), [@MHBauer](https://github.com/MHBauer))

- The Kubernetes API server now correctly detects and closes existing TLS connections when its client certificate file for kubelet authentication has been rotated. ([#115315](https://github.com/kubernetes/kubernetes/pull/115315), [@enj](https://github.com/enj)) [SIG API Machinery, Auth, Node and Testing]

## Changelog since v1.10.11

### Other notable changes

* Updates defaultbackend to 1.5 ([#69381](https://github.com/kubernetes/kubernetes/pull/69381), [@bowei](https://github.com/bowei))
* Immediately close the other side of the connection when proxying. ([#67288](https://github.com/kubernetes/kubernetes/pull/67288), [@MHBauer](https://github.com/MHBauer))

- Fix: skip case sensitivity when checking Azure NSG rules
  fix: ensure InstanceShutdownByProviderID return false for creating Azure VMs ([#104447](https://github.com/kubernetes/kubernetes/pull/104447), [@feiskyer](https://github.com/feiskyer)) [SIG Cloud Provider]
- Fixed occasional pod cgroup freeze when using cgroup v1 and systemd driver.

- Apiserver add a new flag --goaway-chance which is the fraction of requests that will be closed gracefully(GOAWAY) to prevent HTTP/2 clients from getting stuck on a single apiserver. 
  After the connection closed(received GOAWAY), the client's other in-flight requests won't be affected, and the client will reconnect. 

* Switch JSON marshal/unmarshal to json-iterator library.  Performance should be close to previous with no generated code. ([#48287](https://github.com/kubernetes/kubernetes/pull/48287), [@thockin](https://github.com/thockin))

- Fix kubelet to not leak goroutines/intofiy watchers on an inactive connection if it's closed ([#67285](https://github.com/kubernetes/kubernetes/pull/67285), [@yujuhong](https://github.com/yujuhong))
- Fix pod launch by kubelet when --cgroups-per-qos=false and --cgroup-driver="systemd" ([#66617](https://github.com/kubernetes/kubernetes/pull/66617), [@pravisankar](https://github.com/pravisankar))

### API Machinery

- kube-apiserver: the `--runtime-config` flag now supports an `api/beta=false` value which disables all built-in REST API versions matching `v[0-9]+beta[0-9]+`. ([#84304](https://github.com/kubernetes/kubernetes/pull/84304), [@liggitt](https://github.com/liggitt))

* Verify invalid secret/configmap/projected volumes before calling setup ([#68691](https://github.com/kubernetes/kubernetes/pull/68691), [@gnufied](https://github.com/gnufied))
* Immediately close the other side of the connection when proxying. ([#67288](https://github.com/kubernetes/kubernetes/pull/67288), [@MHBauer](https://github.com/MHBauer))

### SIG UI

The migration to the newest version of Angular is still under active development as it is most important thing on the roadmap at the moment. We are getting closer to the new release. We continue fixing bugs and adding other improvements.

### SIG VMWare