STIGQter 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 virtual system calls.

DISA Rule

SV-282620r1200840_rule

Vulnerability Number

V-282620

Group Title

SRG-OS-000480-GPOS-00227

Rule Version

TOSS-05-000029

Severity

CAT II

CCI(s)

Weight

10

Fix Recommendation

Document the use of virtual system calls with the ISSO as an operational requirement or disable them using the following command:

$ sudo grubby --update-kernel=ALL --args="vsyscall=none"

Add or modify the following line in "/etc/default/grub" to ensure the configuration survives kernel updates:

GRUB_CMDLINE_LINUX="vsyscall=none"

Check Contents

Verify the current GRUB 2 configuration disables virtual system calls using the following command:

$ sudo grubby --info=ALL | grep args | grep -v 'vsyscall=none'

If any output is returned and is not documented with the information system security officer (ISSO) as an operational requirement, this is a finding.

Vulnerability Number

V-282620

Documentable

False

Rule Version

TOSS-05-000029

Severity Override Guidance

Verify the current GRUB 2 configuration disables virtual system calls using the following command:

$ sudo grubby --info=ALL | grep args | grep -v 'vsyscall=none'

If any output is returned and 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