An issue exists in the Linux kernel 5.10.x prior to 5.10.155. A use-after-free in io_sqpoll_wait_sq in fs/io_uring.c allows an malicious user 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.
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|---|---|---|
linux linux kernel |
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