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 disable mounting of udf.

DISA Rule

SV-269348r1050230_rule

Vulnerability Number

V-269348

Group Title

SRG-OS-000095-GPOS-00049

Rule Version

ALMA-09-030380

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 udf kernel module from being loaded, create a *.conf file in /etc/modprobe.d/ with the following content:

install udf /bin/false
blacklist udf

Check Contents

Verify that AlmaLinux OS 9 disables the ability to load the udf kernel module with the following command:

$ grep udf /etc/modprobe.conf /etc/modprobe.d/*

blacklist udf

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

Vulnerability Number

V-269348

Documentable

False

Rule Version

ALMA-09-030380

Severity Override Guidance

Verify that AlmaLinux OS 9 disables the ability to load the udf kernel module with the following command:

$ grep udf /etc/modprobe.conf /etc/modprobe.d/*

blacklist udf

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

Check Content Reference

M

Target Key

5664