Medium severity · published Aug 22, 2022
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
5.5
CVSS
0.3%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack vector
Local
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 19% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
KE
Kernel · Linux
before 5.12 · source: NVD
CL
Codeready Linux Builder · Redhat
All versions, or not specified · source: NVD
EL
Enterprise Linux · Redhat
7.0; 8.0 · source: NVD
EL
Enterprise Linux For Ibm Z Systems · Redhat
8.0 · source: NVD
EL
Enterprise Linux For Ibm Z Systems Eus · Redhat
8.6 · source: NVD
EL
Enterprise Linux For Power Little Endian Eus · Redhat
8.6 · source: NVD
EL
Enterprise Linux For Real Time · Redhat
8.0 · source: NVD
EL
Enterprise Linux For Real Time For Nfv · Redhat
8.0 · source: NVD
EL
Enterprise Linux For Real Time For Nfv Tus · Redhat
8.6 · source: NVD
EL
Enterprise Linux For Real Time Tus · Redhat
8.6 · source: NVD
EL
Enterprise Linux Server Aus · Redhat
8.6 · source: NVD
EL
Enterprise Linux Server Eus · Redhat
8.6 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-3659
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-3659
Third Party Advisory
https://access.redhat.com/security/cve/CVE-2021-3659
Issue Tracking
https://bugzilla.redhat.com/show_bug.cgi?id=1975949
Patch
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=1165affd484889d4986cf3b724318935a0b120d8
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