CVE-2021-4023

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.

Category

5.5
CVSS
Severity: Medium
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.09%
Third-Party Advisory redhat.com
Affected: n/a kernel
Published at:
Updated at:

References

Link Tags
https://bugzilla.redhat.com/show_bug.cgi?id=2026484 patch third party advisory issue tracking

Frequently Asked Questions

What is the severity of CVE-2021-4023?
CVE-2021-4023 has been scored as a medium severity vulnerability.
How to fix CVE-2021-4023?
To fix CVE-2021-4023, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-4023 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2021-4023 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-4023?
CVE-2021-4023 affects n/a kernel.
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