What is CVE-2021-4023?

CVE-2021-4023 is a medium-severity vulnerability in Linux Kernel, classified under Information Disclosure. CVSS score: 5.5/10. Published 2022-03-10.

How severe is CVE-2021-4023?

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

Information disclosure in Linux Kernel

CVE-2021-4023

A flaw was found in the io-workqueue implementation in the Linux kernel versions prior to 5.15-rc1. The kernel can panic when an improper cancellation operation triggers the submission of new io-uring operations during a shortage of free space. This flaw allows a local user with permissions to execute io-uring requests to possibly crash the system.

Vulnerability class: Information Disclosure

EPSS: 0.002 (14.5th 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
Fedoraproject Fedora — versions 35
N/a Kernel — versions kernel versions prior to 5.15-rc1

Weakness classification (CWE)

CWE-200 — Information Disclosure

References

secalert@redhat.com (Patch, Third Party Advisory, x_refsource_MISC, Issue Tracking)

Frequently asked questions

What is CVE-2021-4023?: CVE-2021-4023 is a medium-severity vulnerability in Linux Kernel, classified under Information Disclosure. CVSS score: 5.5/10. Published 2022-03-10.
How severe is CVE-2021-4023?: Medium severity. CVSS v3 base score is 5.5 out of 10.