kernel: io_uring/waitid: always prune wait queue entry in io_waitid_wait()

A flaw use after free in the Linux kernel IOURING subsystem was found in the way local user uses iouring interface using IORINGOPWAITID. A local user could use this flaw to crash the system or potentially escalate their privileges on the system...

EUVD-2025-36481

In the Linux kernel, the following vulnerability has been resolved: iouring/waitid: always prune wait queue entry in iowaitidwait For a successful return, always remove our entry from the wait queue entry list. Previously this was skipped if a cancelation was in progress, but this can race with...