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

RHEL 9 must be configured to disable the Controller Area Network kernel module.

DISA Rule

SV-257805r1044856_rule

Vulnerability Number

V-257805

Group Title

SRG-OS-000095-GPOS-00049

Rule Version

RHEL-09-213050

Severity

CAT II

CCI(s)

• CCI-000381 - Configure the system to provide only organization-defined mission essential capabilities.

Weight

10

Fix Recommendation

To configure the system to prevent the can kernel module from being loaded, add the following lines to the file /etc/modprobe.d/can.conf (or create can.conf if it does not exist):

install can /bin/false
blacklist can

Check Contents

Verify that RHEL 9 disables the ability to load the CAN kernel module with the following command:

$ grep -r can /etc/modprobe.conf /etc/modprobe.d/*

install can /bin/false
blacklist can

If the command does not return any output, or the lines are commented out, and use of CAN is not documented with the information system security officer (ISSO) as an operational requirement, this is a finding.

Vulnerability Number

V-257805

Documentable

False

Rule Version

RHEL-09-213050

Severity Override Guidance

Verify that RHEL 9 disables the ability to load the CAN kernel module with the following command:

$ grep -r can /etc/modprobe.conf /etc/modprobe.d/*

install can /bin/false
blacklist can

If the command does not return any output, or the lines are commented out, and use of CAN is not documented with the information system security officer (ISSO) as an operational requirement, this is a finding.

Check Content Reference

M

Target Key

5551