STIGQter: STIG Summary: Red Hat Enterprise Linux 9 Security Technical Implementation Guide Version: 2 Release: 9 Benchmark Date: 01 Jul 2026:

RHEL 9 must mount /dev/shm with the nodev option.

DISA Rule

SV-257863r1155633_rule

Vulnerability Number

V-257863

Group Title

SRG-OS-000368-GPOS-00154

Rule Version

RHEL-09-231110

Severity

CAT II

CCI(s)

• CCI-001764 - Prevent program execution in accordance with organization-defined policies, rules of behavior, and/or access agreements regarding software program usage and restrictions; rules authorizing the terms and conditions of software program usage.

Weight

10

Fix Recommendation

Configure "/dev/shm" to mount with the "nodev" option.

Modify "/etc/fstab" to use the "nodev" option on the "/dev/shm" file system.

To reload all implicit mount units and update the dependency graph so that new options will apply correctly at next remount, run the following command:

$ sudo systemctl daemon-reload

Use the following command to apply the changes immediately without a reboot:

$ sudo mount -o remount /dev/shm

Check Contents

Verify "/dev/shm" is mounted with the "nodev" option with the following command:

$ findmnt /dev/shm

TARGET SOURCE FSTYPE OPTIONS
/dev/shm tmpfs tmpfs rw,nodev,nosuid,noexec,seclabel

If the mount options for /dev/shm does not include nodev, this is a finding.

Vulnerability Number

V-257863

Documentable

False

Rule Version

RHEL-09-231110

Severity Override Guidance

Verify "/dev/shm" is mounted with the "nodev" option with the following command:

$ findmnt /dev/shm

TARGET SOURCE FSTYPE OPTIONS
/dev/shm tmpfs tmpfs rw,nodev,nosuid,noexec,seclabel

If the mount options for /dev/shm does not include nodev, this is a finding.

Check Content Reference

M

Target Key

5551