CVE-2021-3659
MEDIUMCVSS 5.5/10EPSS 0.26%
Last modified
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/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
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://access.redhat.com/security/cve/CVE-2021-3659Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1975949Issue Tracking, Patch, Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2021-3659?
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.
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.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
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Are you affected by CVE-2021-3659?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST