STIGQter: STIG Summary: Oracle Linux 8 Security Technical Implementation Guide Version: 2 Release: 9 Benchmark Date: 01 Jul 2026:

OL 8 must restrict access to the kernel message buffer.

DISA Rule

SV-248579r1156622_rule

Vulnerability Number

V-248579

Group Title

SRG-OS-000138-GPOS-00069

Rule Version

OL08-00-010375

Severity

CAT III

CCI(s)

• CCI-001090 - Prevent unauthorized and unintended information transfer via shared system resources.

Weight

10

Fix Recommendation

Configure OL 8 to restrict access to the kernel message buffer.

Add or edit the following line in /etc/sysctl.d/99-sysctl.conf system configuration file:

kernel.dmesg_restrict = 1

Load settings from all system configuration files with the following command:

$ sudo sysctl --system

Check Contents

Verify OL 8 is configured to restrict access to the kernel message buffer with the following commands:

Check the status of the kernel.dmesg_restrict kernel parameter.

$ sudo sysctl kernel.dmesg_restrict
kernel.dmesg_restrict = 1

If "kernel.dmesg_restrict" is not set to "1" or is missing, this is a finding.

Vulnerability Number

V-248579

Documentable

False

Rule Version

OL08-00-010375

Severity Override Guidance

Verify OL 8 is configured to restrict access to the kernel message buffer with the following commands:

Check the status of the kernel.dmesg_restrict kernel parameter.

$ sudo sysctl kernel.dmesg_restrict
kernel.dmesg_restrict = 1

If "kernel.dmesg_restrict" is not set to "1" or is missing, this is a finding.

Check Content Reference

M

Target Key

5416