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

RHEL 9 must block unauthorized peripherals before establishing a connection.

DISA Rule

SV-258038r1045128_rule

Vulnerability Number

V-258038

Group Title

SRG-OS-000378-GPOS-00163

Rule Version

RHEL-09-291030

Severity

CAT II

CCI(s)

CCI-001958 - Authenticate organization-defined devices and/or types of devices before establishing a local, remote, and/or network connection.

Weight

Fix Recommendation

Configure the operating system to enable the blocking of unauthorized peripherals with the following command:

Note: This command must be run from a root shell and will create an allow list for any usb devices currently connected to the system.

# usbguard generate-policy --no-hash > /etc/usbguard/rules.conf

Note: Enabling and starting usbguard without properly configuring it for an individual system will immediately prevent any access over a usb device such as a keyboard or mouse.

Check Contents

Note: If the system is virtual machine with no virtual or physical USB peripherals attached, this is Not Applicable.

Verify the USBGuard has a policy configured with the following command:

$ sudo usbguard list-rules

allow id 1d6b:0001 serial

If the command does not return results or an error is returned, ask the SA to indicate how unauthorized peripherals are being blocked.

If there is no evidence that unauthorized peripherals are being blocked before establishing a connection, this is a finding.

Vulnerability Number

V-258038

Documentable

False

Rule Version

RHEL-09-291030

Severity Override Guidance

Check Content Reference

Target Key

5551