CVE-2026-99230 io_uring/cmd: don't leave list poison in ->hash_node

In the Linux kernel, the following vulnerability has been resolved: iouring/cmd: don't leave list poison in -hashnode iouringcmddelcancelable uses hlistdel to take a command off -cancelableuringcmd, which leaves LISTPOISON1/2 behind in -hashnode. Requests are recycled through the request cache...