Information
The jffs2 (journaling flash filesystem 2) filesystem type is a log-structured filesystem used in flash memory devices.
Rationale:
Removing support for unneeded filesystem types reduces the local attack surface of the system. If this filesystem type is not needed, disable it.
Solution
Edit or create the file /etc/modprobe.d/CIS.conf and add the following line:
install jffs2 /bin/true
Run the following command to unload the jffs2 module:
# rmmod jffs2