- Updated distroless I-tables to use registry.k8s.io/build-image/distroless-iptables:v0.2.5 ([#118541](https://github.com/kubernetes/kubernetes/pull/118541), [@jeremyrickard](https://github.com/jeremyrickard)) [SIG Testing]

support for flex-volumes in kubeadm. Users were advised to migrate away from flex-volumes as recommended by SIG Storage, since 1.22. If kubeadm users wish to continue using the feature, they would need a custom image for the KCM that is not based on distroless, pass the KCM flag `--flex-volume-plugin-dir` and mount the directory `/usr/libexec/kubernetes/kubelet-plugins/volume/exec` in the KCM static pod using kubeadm's `extraVolumes` mechanism before upgrading to 1.36. Up until now, kubeadm automatically...

   ([#123343](https://github.com/kubernetes/kubernetes/pull/123343), [@haircommander](https://github.com/haircommander))
- Updated `distroless-iptables` to `v0.5.0`, debian-base to `bookworm-v1.0.1`, and setcap to `bookworm-v1.0.1`.
   ([#123170](https://github.com/kubernetes/kubernetes/pull/123170), [@cpanato](https://github.com/cpanato))

## Changelog since v1.26.14

## Changes by Kind

### Feature

- Kubernetes is now built with go 1.21.8
  - update distroless-iptables to v0.4.6 ([#123762](https://github.com/kubernetes/kubernetes/pull/123762), [@cpanato](https://github.com/cpanato)) [SIG Release and Testing]

### Bug or Regression