CVE-2021-4023 — MEDIUM (5.5)

Q: How severe is CVE-2021-4023?

CVE-2021-4023 has been rated MEDIUM with a CVSS base score of 5.5/10. Review the CVSS metrics above for detailed severity breakdown.

Q: Is there a patch for CVE-2021-4023?

Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel, Fedoraproject Fedora.

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.

CVSS Score

5.5

MEDIUM

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

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

NONE

Integrity

NONE

Availability

HIGH

Affected Products

Vendor	Product	Versions
Linux	Linux Kernel	<= 5.14
Fedoraproject	Fedora	35

Related Weaknesses (CWE)

CWE-200

References

https://bugzilla.redhat.com/show_bug.cgi?id=2026484Issue TrackingPatchThird Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2026484Issue TrackingPatchThird Party Advisory

FAQ

What is CVE-2021-4023?

CVE-2021-4023 is a vulnerability with a CVSS score of 5.5 (MEDIUM). 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...

How severe is CVE-2021-4023?

CVE-2021-4023 has been rated MEDIUM with a CVSS base score of 5.5/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2021-4023?

Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel, Fedoraproject Fedora.