How severe is CVE-2021-4023?

This vulnerability has a severity rating of MEDIUM with a CVSS score of 5.5 out of 10.

What type of vulnerability is CVE-2021-4023?

This is classified as CWE-200, which is a common weakness in software security.

CVE-2021-4023

MEDIUM Year: 2021

CVSS v3 Score

5.5

Medium

CVSS v2 Score

4.9

Medium

Weakness Type

CWE-200

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Vulnerability Description

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.

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