- Kubeadm: the preflight check `ContainerRuntimeVersion` validates if the installed container runtime supports the `RuntimeConfig` gRPC method. For older kubelet versions than 1.37, it will return a preflight warning. ([#136898](https://github.com/kubernetes/kubernetes/pull/136898), [@carlory](https://github.com/carlory)) [SIG Cluster Lifecycle]

    /** The key of the message: Schedule */
    public static final String LABELS_CRON_EXPRESSION = "{labels.cronExpression}";

    /** The key of the message: Delete documents older than specified days */
    public static final String LABELS_DAY_FOR_CLEANUP = "{labels.dayForCleanup}";

    /** The key of the message: Concurrent Crawling Count */

- Resolve regression in `metadata.managedFields` handling in update/patch requests submitted by older API clients ([#91748](https://github.com/kubernetes/kubernetes/pull/91748), [@apelisse](https://github.com/apelisse))

- Removed the limitation on exposing port 10250 externally using a Service. ([#129174](https://github.com/kubernetes/kubernetes/pull/129174),...

            and newer CPUs.)
            *   [Example performance speedups.](https://medium.com/intel-analytics-software/leverage-intel-deep-learning-optimizations-in-tensorflow-129faa80ee07)
        *   For older CPUs, oneDNN optimizations are disabled by default.
    *   **Windows x86 package:** oneDNN optimizations are disabled by default.
    *   **Linux aach64 (`--config=mkl_aarch64`) package:**

  3. Single-stack clusters do not need to change, but may choose to use the more specific flags.  Users can use either the older `--node-cidr-mask-size` flag or one of the newer `--node-cidr-mask-size-ipv4` or `--node-cidr-mask-size-ipv6` flags to configure the per-node IP mask size, provided that the flag's IP family matches the cluster's IP family (--cluster-cidr). ([#104...

* Fixes panic if a kubelet is run against an older kube-apiserver ([#74529](https://github.com/kubernetes/kubernetes/pull/74529), [@liggitt](https://github.com/liggitt))

- `DynamicKubeletConfig` feature gate has been removed from the API server.
  Dynamic kubelet reconfiguration now can't be used even when older nodes are still
  attempting to rely on it. This is aligned with the Kubernetes version skew policy.
   ([#112643](https://github.com/kubernetes/kubernetes/pull/112643), [@SergeyKanzhelev](https://github.com/SergeyKanzhelev))

users of that server.  Therefore, public use of a modified version, on
a publicly accessible server, gives the public access to the source
code of the modified version.

  An older license, called the Affero General Public License and
published by Affero, was designed to accomplish similar goals.  This is
a different license, not a version of the Affero GPL, but Affero has

- hcsshim is unchanged from v1.11, at v0.11 ([#64272](https://github.com/kubernetes/kubernetes/pull/64272))
- gitRepo volumes in pods no longer require git 1.8.5 or newer; older git versions are now supported. ([#62394](https://github.com/kubernetes/kubernetes/pull/62394))
- Upgraded crictl on GCE to v1.11.1, up from 1.11.0 on v1.11.  ([#66152](https://github.com/kubernetes/kubernetes/pull/66152))