Medium · published December 24, 2022
An issue was discovered in the Linux kernel 5.10.x before 5.10.155. A use-after-free in io_sqpoll_wait_sq in fs/io_uring.c allows an attacker to crash the kernel, resulting in denial of service. finish_wait can be skipped. An attack can occur in some situations by forking a process and then quickly terminating it. NOTE: later kernel versions, such as the 5.15 longterm series, substantially changed the implementation of io_sqpoll_wait_sq.
| Product | Versions | Fixed in |
|---|---|---|
| linux/linux_kernel | ≥ 5.10, < 5.10.155 | 5.10.155 |