CVE-2026-10670 User-triggerable kernel NULL-pointer dereference (DoS) in `k_thread_name_copy()` syscall verifier

The CONFIGUSERSPACE verification handler for the kthreadnamecopy system call zvrfykthreadnamecopy in kernel/thread.c calls kobjectfind on the caller-supplied thread pointer and then dereferences the returned struct kobject without checking it for NULL. kobjectfind returns NULL whenever the suppli...