# CIS Ubuntu 14.04 LTS - 1.6.1.1 Ensure SELinux is not disabled in bootloader configuration

> Verify that SELinux is not disabled via GRUB bootloader parameters

- Skill: `cyberstrikeus/cis-ubuntu-14-04-lts-1-6-1-1-ensure-selinux-is-not-disabled-` (Agent Skill)
- Install (CLI): `npx skillmds@latest add cyberstrikeus/cis-ubuntu-14-04-lts-1-6-1-1-ensure-selinux-is-not-disabled-`
- Raw SKILL.md: https://api.skillmd.com/api/skills/cyberstrikeus/cis-ubuntu-14-04-lts-1-6-1-1-ensure-selinux-is-not-disabled-/raw
- Safety review: PASS (external: skill-scanner PASS, skillspector PASS)
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Coding & Dev Tools
- Author: cyberstrikeus (https://skillmd.com/u/cyberstrikeus)
- Updated: 2026-09-17
- Page: https://skillmd.com/skills/cyberstrikeus/cis-ubuntu-14-04-lts-1-6-1-1-ensure-selinux-is-not-disabled-

---


# 1.6.1.1 Ensure SELinux is not disabled in bootloader configuration (Scored)

## Profile Applicability

- Level 2 - Server
- Level 2 - Workstation

## Description

Configure SELINUX to be enabled at boot time and verify that it has not been overwritten by the grub boot parameters.

## Rationale

SELinux must be enabled at boot time in your grub configuration to ensure that the controls it provides are not overridden.

## Audit Procedure

Run the following command and verify that no linux line has the `selinux=0` or `enforcing=0` parameters set:

```bash
grep "^\s*linux" /boot/grub/grub.cfg
```

## Expected Result

No linux lines should contain `selinux=0` or `enforcing=0`.

## Remediation

Edit `/etc/default/grub` and remove all instances of `selinux=0` and `enforcing=0` from all CMDLINE_LINUX parameters:

```
GRUB_CMDLINE_LINUX_DEFAULT="quiet"
GRUB_CMDLINE_LINUX=""
```

Run the following command to update the grub2 configuration:

```bash
update-grub
```

## Default Value

Not applicable.

## Notes

This recommendation is designed around the grub bootloader, if LILO or another bootloader is in use in your environment enact equivalent settings.

## References

- CIS Controls: 14.4 Protect Information With Access Control Lists

## Profile

- Level 2 - Server
- Level 2 - Workstation