STIGQter: STIG Summary: Red Hat OpenShift Container Platform 4.x Security Technical Implementation Guide Version: 2 Release: 6 Benchmark Date: 01 Jul 2026:

OpenShift runtime must isolate security functions from nonsecurity functions.

DISA Rule

SV-257547r961131_rule

Vulnerability Number

V-257547

Group Title

SRG-APP-000233-CTR-000585

Rule Version

CNTR-OS-000540

Severity

CAT II

CCI(s)

• CCI-001084 - Isolate security functions from nonsecurity functions.

Weight

10

Fix Recommendation

Apply the machine config by executing the following:

for mcpool in $(oc get mcp -oname | sed "s:.*/::" ); do
echo "apiVersion: machineconfiguration.openshift.io/v1
kind: MachineConfig
metadata:
name: 05-kernelarg-selinux-enforcing-$mcpool
labels:
machineconfiguration.openshift.io/role: $mcpool
spec:
config:
ignition:
version: 3.1.0
kernelArguments:
- enforcing=1
" | oc apply -f -
done

Check Contents

Verify the Red Hat Enterprise Linux CoreOS (RHCOS) verifies correct operation of all security functions by executing the following:

for node in $(oc get node -oname); do oc debug $node -- chroot /host /bin/bash -c 'echo -n "$HOSTNAME "; getenforce' 2>/dev/null; done

If "SELinux" is not active and not in "Enforcing" mode, this is a finding.

Vulnerability Number

V-257547

Documentable

False

Rule Version

CNTR-OS-000540

Severity Override Guidance

Verify the Red Hat Enterprise Linux CoreOS (RHCOS) verifies correct operation of all security functions by executing the following:

for node in $(oc get node -oname); do oc debug $node -- chroot /host /bin/bash -c 'echo -n "$HOSTNAME "; getenforce' 2>/dev/null; done

If "SELinux" is not active and not in "Enforcing" mode, this is a finding.

Check Content Reference

M

Target Key

5547