## Supported Versions

Information about supported Kubernetes versions can be found on the
[Kubernetes version and version skew support policy] page on the Kubernetes website.

## Reporting a Vulnerability

Instructions for reporting a vulnerability can be found on the
[Kubernetes Security and Disclosure Information] page.

### Autoscaling

 - Consuming metrics directly from Heapster is deprecated in favor of
   consuming metrics via an aggregated version of the resource metrics API.

   - In version 1.8, enable this behavior by setting the
     `--horizontal-pod-autoscaler-use-rest-clients` flag to `true`.

## Action Required

- etcd2 as a backend is deprecated and support will be removed in Kubernetes 1.13.

- The resource version option, when passed to a list call, is now consistently interpreted as the minimum allowed resource version.  Previously when listing resources that had the watch cache disabled clients could retrieve a snapshot at that exact resource version.  If the client requests a resource version newer than the current state, a TimeoutError is returned suggesting the client retry in a few seconds....

**Affected Versions**:
  - kube-apiserver v1.29.0 - v1.29.3
  - kube-apiserver v1.28.0 - v1.28.8
  - kube-apiserver <= v1.27.12

**Fixed Versions**:
  - kube-apiserver v1.29.4
  - kube-apiserver v1.28.9
  - kube-apiserver v1.27.13

This vulnerability was reported by tha3e1vl.

- Kubeadm: upgrade supports fallback to the nearest known etcd version if an unknown k8s version is passed ([#88373](https://github.com/kubernetes/kubernetes/pull/88373), [@SataQiu](https://github.com/SataQiu)) [SIG Cluster Lifecycle]

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