- The scheduling queue didn't notice any extenders' failures, it could miss some cluster events,
  and it could end up Pods rejected by Extenders stuck in unschedulable pod pool in 5min in the worst-case scenario.

* Update dashboard version to v1.8.3 ([#57326](https://github.com/kubernetes/kubernetes/pull/57326), [@floreks](https://github.com/floreks))
* Fixes a case when Deployment with recreate strategy could get stuck on old failed Pod. ([#60496](https://github.com/kubernetes/kubernetes/pull/60496), [@tnozicka](https://github.com/tnozicka))

* Bump ip-masq-agent version to v2.3.0 to fix vulnerabilities ([#77834](https://github.com/kubernetes/kubernetes/pull/77834), [@anfernee](https://github.com/anfernee))
* fix pod stuck issue due to corrupt mnt point in flexvol plugin, call Unmount if PathExists returns any error ([#75234](https://github.com/kubernetes/kubernetes/pull/75234), [@andyzhangx](https://github.com/andyzhangx))

- Fix bug where loadbalancer deletion gets stuck because of missing resource group [#75198](https://github.com/kubernetes/kubernetes/issues/75198) ([#93962](https://github.com/kubernetes/kubernetes/pull/93962), [@phiphi282](https://github.com/phiphi282)) [SIG Cloud Provider]

- Fixed stuck apiserver if an aggregated apiservice returned `304 Not Modified` for aggregated discovery information ([#114459](https://github.com/kubernetes/kubernetes/pull/114459), [@alexzielenski](https://github.com/alexzielenski))

* Fixes CVE-2017-1002101 - See https://issue.k8s.io/60813 for details ([#61045](https://github.com/kubernetes/kubernetes/pull/61045), [@liggitt](https://github.com/liggitt))
* Fixes a case when Deployment with recreate strategy could get stuck on old failed Pod. ([#60493](https://github.com/kubernetes/kubernetes/pull/60493), [@tnozicka](https://github.com/tnozicka))

* fix azure disk attach/detach failed forever issue ([#71377](https://github.com/kubernetes/kubernetes/pull/71377), [@andyzhangx](https://github.com/andyzhangx))
* Fixes an issue with stuck connections handling error responses ([#71419](https://github.com/kubernetes/kubernetes/pull/71419), [@liggitt](https://github.com/liggitt))

* Update to use go 1.11.13 ([#81542](https://github.com/kubernetes/kubernetes/pull/81542), [@BenTheElder](https://github.com/BenTheElder))
* Fix Azure client requests stuck issues on http.StatusTooManyRequests (HTTP Code 429). ([#81279](https://github.com/kubernetes/kubernetes/pull/81279), [@feiskyer](https://github.com/feiskyer))

* Fix scheduling starvation of pods in cluster with large number of unschedulable pods. ([#71488](https://github.com/kubernetes/kubernetes/pull/71488), [@bsalamat](https://github.com/bsalamat))
* Fixes an issue with stuck connections handling error responses ([#71419](https://github.com/kubernetes/kubernetes/pull/71419), [@liggitt](https://github.com/liggitt))

- A deprecated flag `--pod-max-in-unschedulable-pods-duration` was initially planned to be removed in v1.26, but we had to change this plan. We found [an issue](https://github.com/kubernetes/kubernetes/issues/110175) in which Pods can be stuck in the unschedulable pod pool for 5 min, and using this flag is the only workaround for this issue.