STIGQter: STIG Summary: Cloud Linux AlmaLinux OS 9 Security Technical Implementation Guide Version: 1 Release: 7 Benchmark Date: 01 Jul 2026:

AlmaLinux OS 9 must block unauthorized peripherals before establishing a connection.

DISA Rule

SV-269382r1050265_rule

Vulnerability Number

V-269382

Group Title

SRG-OS-000378-GPOS-00163

Rule Version

ALMA-09-035440

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 will create an allow list for any USB devices currently connect to the system.

$ usbguard generate-policy --no-hashes | tee /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 a finding.

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

$ usbguard list-rules

1: allow id 1d6b:0002 serial "0000:03:00.0" name "xHCI Host Controller" with-interface 09:00:00 with-connect-type ""
2: allow id 1d6b:0003 serial "0000:03:00.0" name "xHCI Host Controller" with-interface 09:00:00 with-connect-type ""
3: allow id 0627:0001 serial "28754-0000:00:02.2:00.0-1" name "QEMU USB Tablet" with-interface 03:00:00 with-connect-type "unknown"

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-269382

Documentable

False

Rule Version

ALMA-09-035440

Severity Override Guidance

Check Content Reference

Target Key

5664