> Linux’s io_uring is a relatively recent addition that improves asynchronous I/O, but it has been a significant source of security vulnerabilities and is not in widespread use.

Funny, opening the manpage of aio on freebsd you get this on the second paragraph

> Asynchronous I/O operations on some file descriptor types may block an > AIO daemon indefinitely resulting in process and/or system hangs. > Operations on these file descriptor types are considered “unsafe” and > disabled by default. They can be enabled by setting the > vfs.aio.enable_unsafe sysctl node to a non-zero value.

So nothing is safe.