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 restrict access to the kernel message buffer.

DISA Rule

SV-282505r1200495_rule

Vulnerability Number

V-282505

Group Title

SRG-OS-000132-GPOS-00067

Rule Version

TOSS-05-000098

Severity

CAT II

CCI(s)

• CCI-001082 - Separate user functionality, including user interface services, from system management functionality.
• CCI-001090 - Prevent unauthorized and unintended information transfer via shared system resources.

Weight

10

Fix Recommendation

Configure TOSS 5 to restrict access to the kernel message buffer.

Add or edit the following line in a system configuration file, in the "/etc/sysctl.d/" directory:

kernel.dmesg_restrict = 1

Load settings from all system configuration files using the following command:

$ sudo sysctl --system

Check Contents

Verify TOSS 5 is configured to restrict access to the kernel message buffer with the following commands:

$ sudo sysctl kernel.dmesg_restrict

kernel.dmesg_restrict = 1

If "kernel.dmesg_restrict" is not set to "1" or is missing, this is a finding.

Vulnerability Number

V-282505

Documentable

False

Rule Version

TOSS-05-000098

Severity Override Guidance

Verify TOSS 5 is configured to restrict access to the kernel message buffer with the following commands:

$ sudo sysctl kernel.dmesg_restrict

kernel.dmesg_restrict = 1

If "kernel.dmesg_restrict" is not set to "1" or is missing, this is a finding.

Check Content Reference

M

Target Key

5738