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

RHEL 9 duplicate User IDs (UIDs) must not exist for interactive users.

DISA Rule

SV-258045r958482_rule

Vulnerability Number

V-258045

Group Title

SRG-OS-000104-GPOS-00051

Rule Version

RHEL-09-411030

Severity

CAT II

CCI(s)

• CCI-000135 - Generate audit records containing the organization-defined additional information that is to be included in the audit records.
• CCI-000764 - Uniquely identify and authenticate organizational users and associate that unique identification with processes acting on behalf of those users.
• CCI-000804 - Uniquely identify and authenticate non-organizational users or processes acting on behalf of non-organizational users.

Weight

10

Fix Recommendation

Edit the file "/etc/passwd" and provide each interactive user account that has a duplicate UID with a unique UID.

Check Contents

Verify that RHEL 9 contains no duplicate UIDs for interactive users with the following command:

$ sudo awk -F ":" 'list[$3]++{print $1, $3}' /etc/passwd

If output is produced and the accounts listed are interactive user accounts, this is a finding.

Vulnerability Number

V-258045

Documentable

False

Rule Version

RHEL-09-411030

Severity Override Guidance

Verify that RHEL 9 contains no duplicate UIDs for interactive users with the following command:

$ sudo awk -F ":" 'list[$3]++{print $1, $3}' /etc/passwd

If output is produced and the accounts listed are interactive user accounts, this is a finding.

Check Content Reference

M

Target Key

5551