CVE-2023-1583CWE-476

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

Medium · published March 24, 2023

CVSS v3.1
5.5
EPSS
0%
Percentile
10.8
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
5.5 · MEDIUM
Vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CVSS v4.0
Not supplied
EPSS
0.00211 · 10.8th percentile
Weakness
CWE-476 · NULL Pointer Dereference
Published
2023-03-24T00:00Z
EPSS history
Timeline
  • 24 MAR 00:00Z
    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
    cvelistv5