All RHEL 9 interactive users must have a primary group that exists.

Severity
Group ID
Group Title
Version
Rule ID
Date
STIG Version
mediumV-258048SRG-OS-000104-GPOS-00051RHEL-09-411045SV-258048r1069380_rule2025-02-272
Description
If a user is assigned the Group Identifier (GID) of a group that does not exist on the system, and a group with the GID is subsequently created, the user may have unintended rights to any files associated with the group.
ℹ️ Check
Verify that all RHEL 9 interactive users have a valid GID. Check that the interactive users have a valid GID with the following command: $ sudo pwck -r If pwck reports "no group" for any interactive user, this is a finding.
✔️ Fix
Configure the system so that all GIDs are referenced in "/etc/passwd" are defined in "/etc/group". Edit the file "/etc/passwd" and ensure that every user's GID is a valid GID.