CVE-2023-1583 (published 2023-03-24T00:00:00)
A NULL pointer dereference was found in io_file_bitmap_get in io_uring/filetable.c in the io_uring sub-component in the Linux Kernel. When fixed files are unregistered, some context information (file_alloc_{start,end} and alloc_hint) is not cleared. A subsequent request that has auto index selection enabled via IORING_FILE_INDEX_ALLOC can cause a NULL pointer dereference. An unprivileged user can use the flaw to cause a system crash.
Affected products: Vendor: n/a
Product: Linux kernel
Versions: affected kernel 5.19, 6.0, 6.1, 6.2, 6.3