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

RHEL 9 must conceal, via the session lock, information previously visible on the display with a publicly viewable image.

DISA Rule

SV-258027r1045106_rule

Vulnerability Number

V-258027

Group Title

SRG-OS-000031-GPOS-00012

Rule Version

RHEL-09-271085

Severity

CAT II

CCI(s)

Weight

10

Fix Recommendation

Configure RHEL 9 to prevent a user from overriding the picture-uri setting for graphical user interfaces.

In the file "/etc/dconf/db/local.d/00-security-settings", add or update the following lines:

[org/gnome/desktop/screensaver]
picture-uri=''

Prevent user modification by adding the following line to "/etc/dconf/db/local.d/locks/00-security-settings-lock":

/org/gnome/desktop/screensaver/picture-uri

Update the dconf system databases:

$ sudo dconf update

Check Contents

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.

To ensure the screensaver is configured to be blank, run the following command:

$ gsettings writable org.gnome.desktop.screensaver picture-uri

false

If "picture-uri" is writable and the result is "true", this is a finding.

Vulnerability Number

V-258027

Documentable

False

Rule Version

RHEL-09-271085

Severity Override Guidance

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.

To ensure the screensaver is configured to be blank, run the following command:

$ gsettings writable org.gnome.desktop.screensaver picture-uri

false

If "picture-uri" is writable and the result is "true", this is a finding.

Check Content Reference

M

Target Key

5551