Ensure mounting of jffs2 filesystems is disabled - modprobe

Information

The jffs2 (journaling flash filesystem 2) filesystem type is a log-structured filesystem used in flash memory devices.

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

See Also

https://www.cisco.com/c/en/us/td/docs/security/firepower/623/configuration/guide/fpmc-config-guide-v623.html