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

OL 9 must implement address space layout randomization (ASLR) to protect its memory from unauthorized code execution.

DISA Rule

SV-271761r1208732_rule

Vulnerability Number

V-271761

Group Title

SRG-OS-000433-GPOS-00193

Rule Version

OL09-00-002423

Severity

CAT II

CCI(s)

CCI-002824 - Implement organization-defined controls to protect its memory from unauthorized code execution.

Weight

Fix Recommendation

Configure OL 9 to implement ASLR to protect its memory from unauthorized code execution.

Add the configuration item with the following command:

$ echo 'kernel.randomize_va_space = 2' | sudo tee /etc/sysctl.d/99-kernel_randomize_va_space.conf

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

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

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

$ sudo sysctl --system

Check Contents

Verify that OL 9 is implementing ASLR with the following command:

$ sysctl kernel.randomize_va_space
kernel.randomize_va_space = 2

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

$ sudo grep -rs kernel.randomize_va_space /run/sysctl.d/*.conf /usr/local/lib/sysctl.d/*.conf /usr/lib/sysctl.d/*.conf /lib/sysctl.d/*.conf /etc/sysctl.conf /etc/sysctl.d/*.conf
/etc/sysctl.d/99-kernel_randomize_va_space.conf:kernel.randomize_va_space = 2

If "kernel.randomize_va_space" is not set to "2", or is missing, this is a finding.

If conflicting results are returned, this is a finding.

Vulnerability Number

V-271761

Documentable

False

Rule Version

OL09-00-002423

Severity Override Guidance

Check Content Reference

Target Key

5680