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 Asynchronous Transfer Mode kernel module.

DISA Rule

SV-257804r1044853_rule

Vulnerability Number

V-257804

Group Title

SRG-OS-000095-GPOS-00049

Rule Version

RHEL-09-213045

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 atm kernel module from being loaded, add the following line to the file /etc/modprobe.d/atm.conf (or create atm.conf if it does not exist):

install atm /bin/false
blacklist atm

Check Contents

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

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

install atm /bin/false
blacklist atm

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

Vulnerability Number

V-257804

Documentable

False

Rule Version

RHEL-09-213045

Severity Override Guidance

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

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

install atm /bin/false
blacklist atm

If the command does not return any output, or the line is commented out, and use of ATM 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