STIGQter: STIG Summary: SUSE Linux Enterprise Micro (SLEM) 5 Security Technical Implementation Guide Version: 1 Release: 4 Benchmark Date: 01 Apr 2026:

SLEM 5 must restrict access to the kernel message buffer.

DISA Rule

SV-261269r1137695_rule

Vulnerability Number

V-261269

Group Title

SRG-OS-000138-GPOS-00069

Rule Version

SLEM-05-213010

Severity

CAT II

CCI(s)

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

Weight

Fix Recommendation

Configure SLEM 5 to restrict access to the kernel message buffer.

Set the system to the required kernel parameter by adding or modifying the following line in /etc/sysctl.conf or a config file in the /etc/sysctl.d/ directory:

kernel.dmesg_restrict = 1

Remove any configurations that conflict with the above from the following locations:

/run/sysctl.d/
/etc/sysctl.d/
/usr/local/lib/sysctl.d/
/usr/lib/sysctl.d/
/lib/sysctl.d/
/etc/sysctl.conf

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

$ sudo sysctl --system

Check Contents

Verify SLEM 5 is configured to restrict access to the kernel message buffer with the following commands:

> 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 that the configuration files are present to enable this kernel parameter:

> sudo grep -r kernel.dmesg_restrict /run/sysctl.d/* /etc/sysctl.d/* /usr/local/lib/sysctl.d/* /usr/lib/sysctl.d/* /lib/sysctl.d/* /etc/sysctl.conf 2> /dev/null

/etc/sysctl.conf:kernel.dmesg_restrict = 1
/etc/sysctl.d/99-sysctl.conf:kernel.dmesg_restrict = 1

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

If conflicting results are returned, this is a finding.

Vulnerability Number

V-261269

Documentable

False

Rule Version

SLEM-05-213010

Severity Override Guidance

Check Content Reference

Target Key

5596