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 squashfs.

DISA Rule

SV-269346r1050228_rule

Vulnerability Number

V-269346

Group Title

SRG-OS-000095-GPOS-00049

Rule Version

ALMA-09-030160

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

install squashfs /bin/false
blacklist squashfs

Check Contents

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

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

blacklist squashfs

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

Vulnerability Number

V-269346

Documentable

False

Rule Version

ALMA-09-030160

Severity Override Guidance

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

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

blacklist squashfs

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