STIGQter: STIG Summary: Oracle Linux 9 Security Technical Implementation Guide Version: 1 Release: 6 Benchmark Date: 01 Jul 2026:

OL 9 must enable mitigations against processor-based vulnerabilities.

DISA Rule

SV-271735r1091917_rule

Vulnerability Number

V-271735

Group Title

SRG-OS-000433-GPOS-00193

Rule Version

OL09-00-002391

Severity

CAT III

CCI(s)

• CCI-002824 - Implement organization-defined controls to protect its memory from unauthorized code execution.
• CCI-000381 - Configure the system to provide only organization-defined mission essential capabilities.

Weight

10

Fix Recommendation

Configure OL 9 to enable kernel page-table isolation with the following command:

$ sudo grubby --update-kernel=ALL --args="pti=on"

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

GRUB_CMDLINE_LINUX="pti=on"

Check Contents

Verify that OL 9 enables kernel page-table isolation with the following command:

$ sudo grubby --info=ALL | grep pti
args="ro crashkernel=auto resume=/dev/mapper/ol-swap rd.lvm.lv=ol/root rd.lvm.lv=ol/swap rhgb quiet fips=1 audit=1 audit_backlog_limit=8192 pti=on

If the "pti" entry does not equal "on", or is missing, this is a finding.

Check that kernel page-table isolation is enabled by default to persist in kernel updates:

$ sudo grep pti /etc/default/grub
GRUB_CMDLINE_LINUX="pti=on"

If "pti" is not set to "on", is missing or commented out, this is a finding.

Vulnerability Number

V-271735

Documentable

False

Rule Version

OL09-00-002391

Severity Override Guidance

Verify that OL 9 enables kernel page-table isolation with the following command:

$ sudo grubby --info=ALL | grep pti
args="ro crashkernel=auto resume=/dev/mapper/ol-swap rd.lvm.lv=ol/root rd.lvm.lv=ol/swap rhgb quiet fips=1 audit=1 audit_backlog_limit=8192 pti=on

If the "pti" entry does not equal "on", or is missing, this is a finding.

Check that kernel page-table isolation is enabled by default to persist in kernel updates:

$ sudo grep pti /etc/default/grub
GRUB_CMDLINE_LINUX="pti=on"

If "pti" is not set to "on", is missing or commented out, this is a finding.

Check Content Reference

M

Target Key

5680