- A namespaced object with an ownerReference referencing a uid of a namespaced kind which does not exist in the same namespace is now consistently treated as though that owner does not exist, and the child object is deleted.

### CVE-2025-5187: Nodes can delete themselves by adding an OwnerReference

* Fixed an issue with informers missing an `Added` event if a recently deleted object was immediately recreated at the same time the informer dropped a watch and relisted. ([#83911](https://github.com/kubernetes/kubernetes/pull/83911), [@matte21](https://github.com/matte21))

- Kubeadm: when adding new control plane nodes with "kubeadm join", ensure that the etcd member addition is performed only if a given member URL does not already exist in the list of members. Similarly, on "kubeadm reset" only remove an etcd member if its ID exists. ([#127620](https://github.com/kubernetes/kubernetes/pull/127620), [@SataQiu](https://github.com/SataQiu)) [SIG Cluster Lifecycle]

### Other (Cleanup or Flake)

pkg syscall (freebsd-arm), const VWERASE ideal-int
pkg syscall (freebsd-arm), const WCONTINUED ideal-int
pkg syscall (freebsd-arm), const WCOREFLAG ideal-int
pkg syscall (freebsd-arm), const WEXITED ideal-int
pkg syscall (freebsd-arm), const WLINUXCLONE ideal-int
pkg syscall (freebsd-arm), const WNOHANG ideal-int
pkg syscall (freebsd-arm), const WNOWAIT ideal-int
pkg syscall (freebsd-arm), const WSTOPPED ideal-int

pkg os, method (*Process) Kill() error
pkg os, method (*Process) Release() error
pkg os, method (*Process) Signal(Signal) error
pkg os, method (*Process) Wait() (*ProcessState, error)
pkg os, method (*ProcessState) Exited() bool
pkg os, method (*ProcessState) Pid() int
pkg os, method (*ProcessState) String() string
pkg os, method (*ProcessState) Success() bool
pkg os, method (*ProcessState) Sys() interface{}

VSLDOI $1, ZERO, T0, T1 // ...1 VADDUBM XC2, XC2, XC2 // 0xc2... VSPLTISB $7, T2 VOR XC2, T1, XC2 // 0xc2....01 VSPLTB $0, H, T1 // most significant byte VSL H, T0, H // H<<=1 VSRAB T1, T2, T1 // broadcast carry bit VAND T1, XC2, T1 VXOR H, T1, IN // twisted H VSLDOI $8, IN, IN, H // twist even more ... VSLDOI $8, ZERO, XC2, XC2 // 0xc2.0 VSLDOI $8, ZERO, H, HL // ... and split VSLDOI $8, H, ZERO, HH STXVD2X VXC2, (XIP+R0) // save pre-computed table STXVD2X VHL, (XIP+R8) MOVD $0x40, R8 STXVD2X VH, (XIP+R9)...