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1.1.2.2.2 Ensure nodev option set on /dev/shm partition

Audit#

- IF - a separate partition exists for /dev/shm, verify that the nodev option is set. 

# findmnt -kn /dev/shm | grep -v nodev
Nothing should be returned

Remediation#

- IF - a separate partition exists for /dev/shm. Edit the /etc/fstab file and add nodev to the fourth field (mounting options) for the /dev/shm partition. See the fstab(5) manual page for more information. Example: 

tmpfs /dev/shm tmpfs defaults,rw,nosuid,nodev,noexec,relatime 0 0

Run the following command to remount /dev/shm with the configured options: 

# mount -o remount /dev/shm

Note: It is recommended to use tmpfs as the device/filesystem type as /dev/shm is used as shared memory space by applications.