STIGQter STIGQter: STIG Summary: Red Hat Enterprise Linux 8 Security Technical Implementation Guide Version: 2 Release: 8 Benchmark Date: 01 Jul 2026:

RHEL 8 must disable the asynchronous transfer mode (ATM) protocol.

DISA Rule

SV-230494r1069310_rule

Vulnerability Number

V-230494

Group Title

SRG-OS-000095-GPOS-00049

Rule Version

RHEL-08-040021

Severity

CAT III

CCI(s)

Weight

10

Fix Recommendation

Configure the operating system to disable the ability to use the ATM protocol kernel module.

Add or update the following lines in the file "/etc/modprobe.d/blacklist.conf":

install atm /bin/false
blacklist atm

Reboot the system for the settings to take effect.

Check Contents

Verify the operating system disables the ability to load the ATM protocol kernel module and ensure that the ATM protocol kernel module is disabled with the following command:

$ sudo grep -r atm /etc/modprobe.d/* | grep "blacklist"

/etc/modprobe.d/blacklist.conf:install atm /bin/false
/etc/modprobe.d/blacklist.conf:blacklist atm

If the command does not return any output, or the line is commented out, and use of the ATM protocol is not documented with the Information System Security Officer (ISSO) as an operational requirement, this is a finding.

Vulnerability Number

V-230494

Documentable

False

Rule Version

RHEL-08-040021

Severity Override Guidance

Verify the operating system disables the ability to load the ATM protocol kernel module and ensure that the ATM protocol kernel module is disabled with the following command:

$ sudo grep -r atm /etc/modprobe.d/* | grep "blacklist"

/etc/modprobe.d/blacklist.conf:install atm /bin/false
/etc/modprobe.d/blacklist.conf:blacklist atm

If the command does not return any output, or the line is commented out, and use of the ATM protocol is not documented with the Information System Security Officer (ISSO) as an operational requirement, this is a finding.

Check Content Reference

M

Target Key

2921