Oracle Linux 9 Security Technical Implementation Guide

The Oracle Linux 9 Security Technical Implementation Guide (V1 R7) has 450 STIG checks. New to STIG checklists? Read What is a STIG checklist?, CKL vs CKLB, and STIG vs SCAP benchmark.

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Severity

Version

V1 · R7

CurrentPublished Wed Sep 30 2026

OL 9 must enable hardening for the Berkeley Packet Filter (BPF) just-in-time compiler.

Oracle Linux 9 Security Technical Implementation Guide

Assessment Title

Rule Text

OL 9 must enable hardening for the Berkeley Packet Filter (BPF) just-in-time compiler.

Description

Discussion Text

When hardened, the extended BPF just-in-time (JIT) compiler will randomize any kernel addresses in the BPF programs and maps and will not expose the JIT addresses in "/proc/kallsyms".

New to STIG checklists? Read What is a STIG checklist? and CKL vs CKLB.

Objective

V-271768

Rule

SV-271768r1092016_rule

Severity

medium

Rule Version

OL09-00-002430

Documentable

false

IA Controls

NIST SP 800-53

Rev 5

Assessment Procedure

Check Text

Verify that OL 9 enables hardening for the BPF JIT with the following commands:

$ sudo sysctl net.core.bpf_jit_harden
net.core.bpf_jit_harden = 2

If the returned line does not have a value of "2", or a line is not returned, this is a finding.

Implementation Procedure

Fix Text

Configure OL 9 to enable hardening for the BPF JIT compiler by adding the following line to a file, in the "/etc/sysctl.d" directory:

net.core.bpf_jit_harden = 2

The system configuration files need to be reloaded for the changes to take effect. To reload the contents of the files, run the following command:

$ sudo sysctl --system

STIG check 326 of 450 in the Oracle Linux 9 STIG checklist

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