STIGQter STIGQter: STIG Summary: Red Hat Enterprise Linux 9 Security Technical Implementation Guide Version: 2 Release: 9 Benchmark Date: 01 Jul 2026:

RHEL 9 must enable hardening for the Berkeley Packet Filter just-in-time compiler.

DISA Rule

SV-257942r1155718_rule

Vulnerability Number

V-257942

Group Title

SRG-OS-000480-GPOS-00227

Rule Version

RHEL-09-251045

Severity

CAT II

CCI(s)

Weight

10

Fix Recommendation

Configure RHEL 9 to enable hardening for the BPF JIT compiler.

Create the drop-in file if it does not already exist:

$ sudo vi /etc/sysctl.d/99-net_core-bpf_jit_harden.conf

Add the following line to the file:
net.core.bpf_jit_harden = 2

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

$ sudo sysctl --system

Check Contents

Verify RHEL 9 enables hardening for the BPF JIT compiler.

Check the status of the "net.core.bpf_jit_harden" parameter with the following command:

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

If "net.core.bpf_jit_harden" is not equal to "2" or is missing, this is a finding.

Vulnerability Number

V-257942

Documentable

False

Rule Version

RHEL-09-251045

Severity Override Guidance

Verify RHEL 9 enables hardening for the BPF JIT compiler.

Check the status of the "net.core.bpf_jit_harden" parameter with the following command:

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

If "net.core.bpf_jit_harden" is not equal to "2" or is missing, this is a finding.

Check Content Reference

M

Target Key

5551