- Kube-scheduler: fixes a 1.27.14 regression that can lead to a scheduler crash when processing pods with affinity that doesn't match a real/valid node ([#125043](https://github.com/kubernetes/kubernetes/pull/125043), [@AxeZhan](https://github.com/AxeZhan)) [SIG Scheduling and Testing]

## Dependencies

# optionally, remove the old secret
kubectl delete secret --namespace=federation federation-apiserver-secret
```

- Kubernetes components no longer handle panics, and instead actively crash.  All Kubernetes components should be run by something that actively restarts them. This is true of the default setups, but those with custom environments may need to double-check (#28800, @lavalamp)

- 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]

    *   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]

- 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]

- 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))