A NULL pointer dereference issue was discovered in the Linux kernel in io_files_update_with_index_alloc. A local user could use this flaw to potentially crash the system causing a denial of service.
https://lore.kernel.org/all/d5a19c1e-9968-e22e-5917-c3139c5e7e89%40kernel.dk/
https://github.com/torvalds/linux/commit/d785a773bed966a75ca1f11d108ae1897189975b