Home/CVE/A NULL pointer dereference flaw was found in the Linux kernel’s IEEE 802.15.4 wireless networking subsystem in the way
CVE

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

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.

MEDIUM · CVSS 5.5 EPSS 0.00122
Monitor
  • No active-exploitation, high-EPSS, or public-exploit signals - routine patching cadence
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-252Unchecked Return Value
CWE-476NULL Pointer Dereference
▤

Affected Products & Versions

14
linux kernel< 5.12
fedoraproject fedoraall versions
redhat enterprise linuxall versions
redhat enterprise linux for ibm z systemsall versions
redhat enterprise linux for ibm z systems eusall versions
redhat enterprise linux for real timeall versions
redhat enterprise linux for real time for nfvall versions
redhat enterprise linux for real time for nfv tusall versions
▣

Scoring & Timeline

5.5
MEDIUM · CVSS v3.1 · secalert@redhat.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD22 Aug 2022 · 03:15 PM
CVSS VectorCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
⚑

Vendor Advisories

23
rhsaRHSA-2021:4356Low
rhsaRHSA-2021:4140Low
usnUSN-6014-1
usnUSN-6013-1
usnUSN-6001-1
🔗

References & Sources

3
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://access.redhat.com/security/cve/CVE-2021-3659Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1975949Issue TrackingPatchThird Party Advisory
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=1165affd484889d4986cf3b724318935a0b120d8PatchVendor Advisory
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