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 exposed kernel pointer addresses access.

DISA Rule

SV-282507r1200501_rule

Vulnerability Number

V-282507

Group Title

SRG-OS-000132-GPOS-00067

Rule Version

TOSS-05-000101

Severity

CAT II

CCI(s)

• CCI-001082 - Separate user functionality, including user interface services, from system management functionality.
• CCI-002824 - Implement organization-defined controls to protect its memory from unauthorized code execution.

Weight

10

Fix Recommendation

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

kernel.kptr_restrict = 1

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

$ sudo sysctl --system

Check Contents

Verify the runtime status of the "kernel.kptr_restrict" kernel parameter using the following command:

$ sudo sysctl kernel.kptr_restrict

kernel.kptr_restrict = 1

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

Vulnerability Number

V-282507

Documentable

False

Rule Version

TOSS-05-000101

Severity Override Guidance

Verify the runtime status of the "kernel.kptr_restrict" kernel parameter using the following command:

$ sudo sysctl kernel.kptr_restrict

kernel.kptr_restrict = 1

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

Check Content Reference

M

Target Key

5738