STIGQter: STIG Summary: Tri-Lab Operating System Stack (TOSS) 4 Security Technical Implementation Guide Version: 2 Release: 6 Benchmark Date: 01 Jul 2026:

TOSS must restrict exposed kernel pointer addresses access.

DISA Rule

SV-253132r991589_rule

Vulnerability Number

V-253132

Group Title

SRG-OS-000480-GPOS-00227

Rule Version

TOSS-04-040910

Severity

CAT II

CCI(s)

• CCI-000366 - Implement the security configuration settings.

Weight

10

Fix Recommendation

Configure TOSS to restrict exposed kernel pointer addresses access by adding the following line to a file in the "/etc/sysctl.d" directory:

kernel.kptr_restrict = 1

The system configuration files need to be reloaded for the changes to take effect. To reload the contents of the files, run the following command:

$ sudo sysctl --system

Check Contents

Verify TOSS restricts exposed kernel pointer addresses access with the following commands:

$ sudo sysctl kernel.kptr_restrict

kernel.kptr_restrict = 1

If the returned line does not have a value of "1", or a line is not returned, this is a finding.

Vulnerability Number

V-253132

Documentable

False

Rule Version

TOSS-04-040910

Severity Override Guidance

Verify TOSS restricts exposed kernel pointer addresses access with the following commands:

$ sudo sysctl kernel.kptr_restrict

kernel.kptr_restrict = 1

If the returned line does not have a value of "1", or a line is not returned, this is a finding.

Check Content Reference

M

Target Key

5469