STIGQter: STIG Summary: Tri-Lab Operating System Stack (TOSS) 5 Security Technical Implementation Guide Version: 1 Release: 1 Benchmark Date: 26 Mar 2026:

TOSS 5 must disable mounting of cramfs.

DISA Rule

SV-282483r1200429_rule

Vulnerability Number

V-282483

Group Title

SRG-OS-000095-GPOS-00049

Rule Version

TOSS-05-000138

Severity

CAT III

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

install cramfs /bin/false
blacklist cramfs

Check Contents

Verify TOSS 5 disables the ability to load the "cramfs" kernel module using the following command:

$ sudo grep -r cramfs /etc/modprobe.conf /etc/modprobe.d/*

blacklist cramfs

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

Vulnerability Number

V-282483

Documentable

False

Rule Version

TOSS-05-000138

Severity Override Guidance

Verify TOSS 5 disables the ability to load the "cramfs" kernel module using the following command:

$ sudo grep -r cramfs /etc/modprobe.conf /etc/modprobe.d/*

blacklist cramfs

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

Check Content Reference

M

Target Key

5738