CVE-2021-4023

MEDIUM

Linux Kernel < 5.15-rc1 - Denial of Service via io-workqueue Cancellation

Title source: llm

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.

References (1)

Core 1

Core References

Issue Tracking, Patch, Third Party Advisory x_refsource_misc

https://bugzilla.redhat.com/show_bug.cgi?id=2026484

Scores

CVSS v3 5.5

EPSS 0.0003

EPSS Percentile 8.8%

Attack Vector LOCAL

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Details

CWE

CWE-200

Status published

Products (2)

fedoraproject/fedora 35

linux/linux_kernel < 5.14

Published Mar 10, 2022

Tracked Since Feb 18, 2026