CVE-2024-35820 Information

Description

In the Linux kernel the following vulnerability has been resolved:

io_uring: fix io_queue_proc modifying req->flags

With multiple poll entries __io_queue_proc() might be running in parallel with poll handlers and possibly task_work we should not be carelessly modifying req->flags there. io_poll_double_prepare() handles a similar case with locking but it’s much easier to move it into __io_arm_poll_handler().

Reference

https://git.kernel.org/stable/c/51a490a7f63cae0754120e7c04f4f47920bd48db https://git.kernel.org/stable/c/0ecb8919469e6d5c74eea24086b34ce1bda5aef7 https://git.kernel.org/stable/c/1a8ec63b2b6c91caec87d4e132b1f71b5df342be