RHEL 9 must use a separate file system for /var/tmp.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
| V-257848 | RHEL-09-231035 | SV-257848r1044926_rule | CCI-000366 | medium |
| Description | ||||
| The "/var/tmp" partition is used as temporary storage by many programs. Placing "/var/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-257848r1044926_chk)
Verify that a separate file system/partition has been created for "/var/tmp" with the following command:
$ mount | grep /var/tmp
/dev/mapper/rhel-tmp on /var/tmp type xfs (rw,nosuid,nodev,noexec,relatime,seclabel,attr2,inode64,logbufs=8,logbsize=32k)
Note: Options displayed for mount may differ.
If a separate entry for "/var/tmp" is not in use, this is a finding.
Fix Text (F-61513r925530_fix)
Migrate the "/var/tmp" path onto a separate file system.