Linux Kernel Panic Vulnerability: Improper Cancellation Operation Triggers io-uring Panic

CVE-2021-4023 · MEDIUM Severity

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

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.

Learn more about our Cis Benchmark Audit For Distribution Independent Linux.