CVE-2021-3659

Name: CVE-2021-3659
Creator: NVD / NIST
Published: 2022-08-22T15:15:13.69+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.5/10EPSS 0.26%

Last modified Jun 17, 2026

CVE-2021-3659 is a medium-severity vulnerability rated 5.5/10 on the CVSS scale. A NULL pointer dereference flaw was found in the Linux kernel’s IEEE 802.15.4 wireless networking subsystem in the way the user closes the LR-WPAN connection. This flaw allows a local user to crash the system. EPSS estimates a 0.26% chance of exploitation in the next 30 days.

Description

A NULL pointer dereference flaw was found in the Linux kernel’s IEEE 802.15.4 wireless networking subsystem in the way the user closes the LR-WPAN connection. This flaw allows a local user to crash the system. The highest threat from this vulnerability is to system availability.

Metrics

CVSS 3.1

5.5/10

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

EPSS Probability

0.26%

17.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Linux	Linux Kernel	< 5.12
Fedoraproject	Fedora	34
Redhat	Enterprise Linux	7.0
Redhat	Enterprise Linux	8.0
Redhat	Enterprise Linux For Ibm Z Systems	8.0
Redhat	Enterprise Linux For Ibm Z Systems Eus	8.6
Redhat	Enterprise Linux For Power Little Endian Eus	8.6
Redhat	Enterprise Linux For Real Time	8.0
Redhat	Enterprise Linux For Real Time For Nfv	8.0
Redhat	Enterprise Linux For Real Time For Nfv Tus	8.6
Redhat	Enterprise Linux For Real Time Tus	8.6
Redhat	Enterprise Linux Server Aus	8.6
Redhat	Enterprise Linux Server Eus	8.6
Redhat	Enterprise Linux Server Tus	8.6
Redhat	Codeready Linux Builder	All versions
Redhat	Virtualization Host	4.0

References

https://access.redhat.com/security/cve/CVE-2021-3659Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1975949Issue Tracking, Patch, Third Party Advisory
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=1165affd484889d4986cf3b724318935a0b120d8Patch, Vendor Advisory
https://access.redhat.com/security/cve/CVE-2021-3659Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1975949Issue Tracking, Patch, Third Party Advisory
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=1165affd484889d4986cf3b724318935a0b120d8Patch, Vendor Advisory

Timeline

Published: Aug 22, 2022
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-3659?

How severe is CVE-2021-3659?

CVE-2021-3659 has a CVSS score of 5.5/10 (MEDIUM severity). The EPSS model estimates a 0.26% probability of exploitation in the next 30 days.

How do I fix CVE-2021-3659?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-3659?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST