- Fixed potential scheduler crash when scheduling with unsatisfied nodes in PodTopologySpread. ([#110984](https://github.com/kubernetes/kubernetes/pull/110984), [@kerthcet](https://github.com/kerthcet)) [SIG Scheduling]

- Kube-apiserver: fixes a potential crash serving CustomResourceDefinitions that combine an invalid schema and CEL validation rules. ([#126167](https://github.com/kubernetes/kubernetes/pull/126167), [@cici37](https://github.com/cici37)) [SIG API Machinery and Testing]

- Kube-apiserver: fixes a potential crash serving CustomResourceDefinitions that combine an invalid schema and CEL validation rules. ([#126167](https://github.com/kubernetes/kubernetes/pull/126167), [@cici37](https://github.com/cici37)) [SIG API Machinery and Testing]

    *   reflector_watches_total
    * While this is a backwards-incompatible change, it would have been impossible to setup reliable monitoring around these metrics since the labels were not stable. 
* Fix keymutex issues which may crash in some platforms. ([#74386](https://github.com/kubernetes/kubernetes/pull/74386), [@danielqsj](https://github.com/danielqsj))



# v1.12.6

[Documentation](https://docs.k8s.io)

## Downloads for v1.12.6

- Fix memory leak on kube-scheduler preemption ([#111803](https://github.com/kubernetes/kubernetes/pull/111803), [@amewayne](https://github.com/amewayne)) [SIG Scheduling]
- Fixed potential scheduler crash when scheduling with unsatisfied nodes in PodTopologySpread. ([#111511](https://github.com/kubernetes/kubernetes/pull/111511), [@kerthcet](https://github.com/kerthcet)) [SIG Scheduling]

- Fixed 1.31 regression that can crash kube-controller-manager's service-lb-controller loop. ([#128182](https://github.com/kubernetes/kubernetes/pull/128182), [@carlory](https://github.com/carlory)) [SIG API Machinery, Cloud Provider and Network]

* remove retry operation on attach/detach  azure disk ([#70568](https://github.com/kubernetes/kubernetes/pull/70568), [@andyzhangx](https://github.com/andyzhangx))
* Fix cloud-controller-manager crash when using OpenStack provider and PersistentVolume initializing controller   ([#70459](https://github.com/kubernetes/kubernetes/pull/70459), [@mvladev](https://github.com/mvladev))

- Fixes problem where invalid selector on `PodDisruptionBudget` leads to a nil pointer dereference that causes the Controller manager to crash loop. ([#98750](https://github.com/kubernetes/kubernetes/pull/98750), [@mortent](https://github.com/mortent))

## Changelog since v1.33.9

## Changes by Kind

### Bug or Regression

- Fix bug in ValidatingAdmissionPolicy where a object schema with additionalProperties:true would crash the kube-controller-manager with a nil pointer exception. ([#136958](https://github.com/kubernetes/kubernetes/pull/136958), [@lalitc375](https://github.com/lalitc375)) [SIG API Machinery]

- Fixed potential scheduler crash when scheduling with unsatisfied nodes in PodTopologySpread. ([#110853](https://github.com/kubernetes/kubernetes/pull/110853), [@kerthcet](https://github.com/kerthcet)) [SIG Scheduling]