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

RHEL 9 must prevent a user from overriding the Ctrl-Alt-Del sequence settings for the graphical user interface.

DISA Rule

SV-258032r1045117_rule

Vulnerability Number

V-258032

Group Title

SRG-OS-000480-GPOS-00227

Rule Version

RHEL-09-271110

Severity

CAT II

CCI(s)

CCI-000366 - Implement the security configuration settings.

Weight

Fix Recommendation

Configure RHEL 9 to disallow the user changing the Ctrl-Alt-Del sequence in the GNOME desktop.

Create a database to contain the systemwide graphical user logon settings (if it does not already exist) with the following command:

$ sudo touch /etc/dconf/db/local.d/locks/session

Add the following line to the session locks file to prevent nonprivileged users from modifying the Ctrl-Alt-Del setting:

/org/gnome/settings-daemon/plugins/media-keys/logout

Run the following command to update the database:

$ sudo dconf update

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Note: This requirement assumes the use of the RHEL 9 default graphical user interface, the GNOME desktop environment. If the system does not have any graphical user interface installed, this requirement is Not Applicable.

Verify that users cannot enable the Ctrl-Alt-Del sequence in the GNOME desktop with the following command:

$ gsettings writable org.gnome.settings-daemon.plugins.media-keys logout

false

If "logout" is writable and the result is "true", this is a finding.

Vulnerability Number

V-258032

Documentable

False

Rule Version

RHEL-09-271110

Severity Override Guidance

Check Content Reference

Target Key

5551