{"schema_version":"1.7.5","id":"CVE-2023-1583","published":"2023-03-24T22:15:07.137Z","modified":"2026-03-14T11:57:46.165331Z","related":["SUSE-SU-2023:2646-1","SUSE-SU-2023:2809-1","SUSE-SU-2023:2871-1"],"details":"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":[{"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2023-1583.json","unresolved_ranges":[{"events":[{"introduced":"5.19"},{"fixed":"6.1.22"}]},{"events":[{"introduced":"6.2.0"},{"fixed":"6.2.9"}]}]}}],"references":[{"type":"FIX","url":"https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=02a4d923e4400a36d340ea12d8058f69ebf3a383"},{"type":"FIX","url":"https://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux-block.git/commit/?h=io_uring-6.3&id=761efd55a0227aca3a69deacdaa112fffd44fe37"}],"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"}]}