What is CVE-2023-1583?

CVE-2023-1583 is a medium-severity vulnerability in Linux Kernel, classified under NULL Pointer Dereference. CVSS score: 5.5/10. Published 2023-03-24.

How severe is CVE-2023-1583?

Medium severity. CVSS v3 base score is 5.5 out of 10.

NULL pointer dereference in Linux Kernel

CVE-2023-1583

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.

EPSS: 0.002 (11.6th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

Affected products

Linux Linux_kernel
N/a Linux Kernel — versions affected kernel 5.19, 6.0, 6.1, 6.2, 6.3

Weakness classification (CWE)

CWE-476 — NULL Pointer Dereference

References

secalert@redhat.com (Patch, Mailing List)
secalert@redhat.com (Patch, Mailing List)

Frequently asked questions

What is CVE-2023-1583?: CVE-2023-1583 is a medium-severity vulnerability in Linux Kernel, classified under NULL Pointer Dereference. CVSS score: 5.5/10. Published 2023-03-24.
How severe is CVE-2023-1583?: Medium severity. CVSS v3 base score is 5.5 out of 10.