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

Successful/unsuccessful uses of the umount system call in RHEL 9 must generate an audit record.

DISA Rule

SV-258215r1155611_rule

Vulnerability Number

V-258215

Group Title

SRG-OS-000037-GPOS-00015

Rule Version

RHEL-09-654205

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 the audit system to generate an audit event for any successful/unsuccessful use of the "umount" system call by adding or updating the following rules in "/etc/audit/audit.rules" and adding the following rules to "/etc/audit/rules.d/perm_mod.rules" or updating the existing rules in files in the "/etc/audit/rules.d/" directory:

-a always,exit -F arch=b32 -S umount -F auid>=1000 -F auid!=unset -k privileged-umount

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

$ sudo augenrules --load

Check Contents

Verify RHEL 9 generates an audit record for all uses of the "umount" and system call with the following command:

$ sudo auditctl -l | grep b32 | grep 'umount\b'

-a always,exit -F arch=b32 -S umount -F auid>=1000 -F auid!=-1 -F key=privileged-umount

If the command does not return a line, or the line is commented out, this is a finding.

Vulnerability Number

V-258215

Documentable

False

Rule Version

RHEL-09-654205

Severity Override Guidance

Verify RHEL 9 generates an audit record for all uses of the "umount" and system call with the following command:

$ sudo auditctl -l | grep b32 | grep 'umount\b'

-a always,exit -F arch=b32 -S umount -F auid>=1000 -F auid!=-1 -F key=privileged-umount

If the command does not return a line, or the line is commented out, this is a finding.

Check Content Reference

M

Target Key

5551