Prior to 1.17 and for existing nodes created by `kubeadm init` where kubelet client certificate rotation is desired, you must modify `/etc/kubernetes/kubelet.conf` to point to the PEM symlink for rotation:

    - [Node Binaries](#node-binaries-9)
  - [Changelog since v1.21.4](#changelog-since-v1214)
  - [Important Security Information](#important-security-information)
    - [CVE-2021-25741: Symlink Exchange Can Allow Host Filesystem Access](#cve-2021-25741-symlink-exchange-can-allow-host-filesystem-access)
  - [Changes by Kind](#changes-by-kind-8)
    - [Feature](#feature-6)
    - [Bug or Regression](#bug-or-regression-8)

* CRI now defines mounting behavior. If the host path doesn't exist, the runtime should return an error. If the host path is a symlink, the runtime should follow the symlink and mount the real destination to the container. ([#61460](https://github.com/kubernetes/kubernetes/pull/61460), [@feiskyer](https://github.com/feiskyer))

### SIG OpenStack

* Add /bin/mkfifo symlink to bazel build for busybox, so that CI builds have /bin/tee ([#59268](https://github.com/kubernetes/kubernetes/pull/59268), [@justinsb](https://github.com/justinsb))

    - [Node Binaries](#node-binaries-15)
  - [Changelog since v1.22.1](#changelog-since-v1221)
  - [Important Security Information](#important-security-information-2)
    - [CVE-2021-25741: Symlink Exchange Can Allow Host Filesystem Access](#cve-2021-25741-symlink-exchange-can-allow-host-filesystem-access)
  - [Changes by Kind](#changes-by-kind-14)
    - [Feature](#feature-7)
    - [Bug or Regression](#bug-or-regression-14)

    - [Node Binaries](#node-binaries-4)
  - [Changelog since v1.20.10](#changelog-since-v12010)
  - [Important Security Information](#important-security-information)
    - [CVE-2021-25741: Symlink Exchange Can Allow Host Filesystem Access](#cve-2021-25741-symlink-exchange-can-allow-host-filesystem-access)
  - [Changes by Kind](#changes-by-kind-4)
    - [Bug or Regression](#bug-or-regression-4)
    - [Other (Cleanup or Flake)](#other-cleanup-or-flake-1)

* Fixed pod cleanup when /var/lib/kubelet is a symlink. ([#68741](https://github.com/kubernetes/kubernetes/pull/68741), [@jsafrane](https://github.com/jsafrane))

- `kube-apiserver` updated:

* Fix pods failing to start when subPath is a dangling symlink from kubelet point of view, which can happen if it is running inside a container ([#48555](https://github.com/kubernetes/kubernetes/pull/48555), [@redbaron](https://github.com/redbaron))