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 access to network bpf system call from nonprivileged processes.

DISA Rule

SV-282508r1200504_rule

Vulnerability Number

V-282508

Group Title

SRG-OS-000132-GPOS-00067

Rule Version

TOSS-05-000109

Severity

CAT II

CCI(s)

• CCI-001082 - Separate user functionality, including user interface services, from system management functionality.

Weight

10

Fix Recommendation

Configure TOSS 5 to prevent privilege escalation through the kernel by disabling access to the bpf syscall by adding the following line to a file, in the "/etc/sysctl.d" directory:

kernel.unprivileged_bpf_disabled = 1

The system configuration files must 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 5 prevents privilege escalation through the kernel by disabling access to the bpf system call using the following command:

$ sudo sysctl kernel.unprivileged_bpf_disabled

kernel.unprivileged_bpf_disabled = 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-282508

Documentable

False

Rule Version

TOSS-05-000109

Severity Override Guidance

Verify TOSS 5 prevents privilege escalation through the kernel by disabling access to the bpf system call using the following command:

$ sudo sysctl kernel.unprivileged_bpf_disabled

kernel.unprivileged_bpf_disabled = 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

5738