RHEL 9 must use a separate file system for /tmp.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
| V-257844 | RHEL-09-231015 | SV-257844r1044918_rule | CCI-000366 | medium |
| Description | ||||
| The "/tmp" partition is used as temporary storage by many programs. Placing "/tmp" in its own partition enables the setting of more restrictive mount options, which can help protect programs that use it. | ||||
| STIG | Date | |||
| Red Hat Enterprise Linux 9 Security Technical Implementation Guide | 2025-05-14 | |||
Details
Check Text (C-257844r1044918_chk)
Verify that a separate file system/partition has been created for "/tmp" with the following command:
$ mount | grep /tmp
/dev/mapper/rhel-tmp on /tmp type xfs (rw,nodev,nosuid,noexec,seclabel)
If a separate entry for "/tmp" is not in use, this is a finding.
Fix Text (F-61509r925518_fix)
Migrate the "/tmp" path onto a separate file system.