- Log messages in JSON format are written to stderr by default now (same as text format) instead of stdout. Users who expected JSON output on stdout must now capture stderr instead or in addition to stdout. ([#106146](https://github.com/kubernetes/kubernetes/pull/106146), [@pohly](https://github.com/pohly)) [SIG API Machinery, Architecture, Cluster Lifecycle...

- When a watch is closed by an HTTP2 load balancer and we are told to go away, skip printing the message to stderr by default.
- Spedup kubectl by >10 when calling out to kube-apiserver for discovery information. ([#73345](https://github.com/kubernetes/kubernetes/pull/73345), [@sttts](https://github.com/sttts))

- Added a `Stream` field to `PodLogOptions`, which allows clients to request certain log stream (stdout or stderr) of the container.

- Kubectl version changed to write a warning message to stderr if the client and server version difference exceeds the supported version skew of +/-1 minor version. ([#98250](https://github.com/kubernetes/kubernetes/pull/98250), [@brianpursley](https://github.com/brianpursley)) [SIG CLI]

- Update the system-validators library to v1.5.0. Includes validation for `seccomp` and fixes a stdout/stderr problem in the Docker validator. ([#103390](https://github.com/kubernetes/kubernetes/pull/103390), [@ironyman](https://github.com/ironyman))
- Updates the following images to pick up CVE fixes:
  - `debian` to v1.8.0

pkg syscall (darwin-arm64), type Timeval32 struct, Sec int32
pkg syscall (darwin-arm64), type Timeval32 struct, Usec int32
pkg syscall (darwin-arm64), type WaitStatus uint32
pkg syscall (darwin-arm64), var Stderr int
pkg syscall (darwin-arm64), var Stdin int
pkg syscall (darwin-arm64), var Stdout int
pkg syscall (darwin-arm64-cgo), const AF_APPLETALK = 16
pkg syscall (darwin-arm64-cgo), const AF_APPLETALK ideal-int

pkg syscall (netbsd-arm64-cgo), type Timeval struct, Sec int64
pkg syscall (netbsd-arm64-cgo), type Timeval struct, Usec int32
pkg syscall (netbsd-arm64-cgo), type WaitStatus uint32
pkg syscall (netbsd-arm64-cgo), var Stderr int
pkg syscall (netbsd-arm64-cgo), var Stdin int
pkg syscall (netbsd-arm64-cgo), var Stdout int
pkg syscall (netbsd-arm64), const AF_APPLETALK = 16
pkg syscall (netbsd-arm64), const AF_APPLETALK ideal-int

- Kubeadm: all warning messages are printed to stderr instead of stdout. ([#107467](https://github.com/kubernetes/kubernetes/pull/107467), [@SataQiu](https://github.com/SataQiu))

* s390x ingress controller support ([#52663](https://github.com/kubernetes/kubernetes/pull/52663), [@wwwtyro](https://github.com/wwwtyro))
* CRI: Add stdout/stderr fields to Exec and Attach requests. ([#52686](https://github.com/kubernetes/kubernetes/pull/52686), [@yujuhong](https://github.com/yujuhong))