macOS 10.14.6 (18G87) - Kernel Use-After-Free due to Race Condition in wait_for_namespace_event()

macOS 10.14.6 18G87 - Kernel Use-After-Free due to Race Condition in waitfornamespaceevent The XNU function waitfornamespaceevent in bsd/vfs/vfssyscalls.c releases a file descriptor for use by userspace but may then subsequently destroy that file descriptor using fpfree, which unconditionally fre...