CVE-2021-4023: Fedoraproject Fedora

Medium severity, CVSS 5.5. EPSS: 0.2% chance of exploitation in the next 30 days.

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.

Affected products

• Fedoraproject Fedora: version 35 only
• Linux Linux Kernel: up to and including 5.14

Published 2022-03-10. Last modified 2026-06-17.