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

RHEL 9 must audit all uses of umount system calls.

DISA Rule

SV-258180r1045325_rule

Vulnerability Number

V-258180

Group Title

SRG-OS-000037-GPOS-00015

Rule Version

RHEL-09-654030

Severity

CAT II

CCI(s)

• CCI-000130 - Ensure that audit records containing information that establishes what type of event occurred.
• CCI-000169 - Provide audit record generation capability for the event types the system is capable of auditing as defined in AU-2 a. on organization-defined information system components.
• CCI-000172 - Generate audit records for the event types defined in AU-2 c that include the audit record content defined in AU-3.
• CCI-002884 - Log organization-defined audit events for nonlocal maintenance and diagnostic sessions.

Weight

10

Fix Recommendation

Configure RHEL 9 to generate audit records upon successful/unsuccessful attempts to use the "umount" command by adding or updating the following rules in "/etc/audit/rules.d/audit.rules":

-a always,exit -F path=/usr/bin/umount -F perm=x -F auid>=1000 -F auid!=unset -k privileged-mount

To load the rules to the kernel immediately, use the following command:

$ sudo augenrules --load

Check Contents

Verify that RHEL 9 is configured to audit the execution of the "umount" command with the following command:

$ sudo auditctl -l | grep /usr/bin/umount

-a always,exit -S all -F path=/usr/bin/umount -F perm=x -F auid>=1000 -F auid!=-1 -F key=privileged-mount

If the command does not return an audit rule for "umount" or any of the lines returned are commented out, this is a finding.

Vulnerability Number

V-258180

Documentable

False

Rule Version

RHEL-09-654030

Severity Override Guidance

Verify that RHEL 9 is configured to audit the execution of the "umount" command with the following command:

$ sudo auditctl -l | grep /usr/bin/umount

-a always,exit -S all -F path=/usr/bin/umount -F perm=x -F auid>=1000 -F auid!=-1 -F key=privileged-mount

If the command does not return an audit rule for "umount" or any of the lines returned are commented out, this is a finding.

Check Content Reference

M

Target Key

5551