STIGQter: STIG Summary: Cloud Linux AlmaLinux OS 9 Security Technical Implementation Guide Version: 1 Release: 7 Benchmark Date: 01 Jul 2026:

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

DISA Rule

SV-269273r1050155_rule

Vulnerability Number

V-269273

Group Title

SRG-OS-000480-GPOS-00227

Rule Version

ALMA-09-021800

Severity

CAT II

CCI(s)

CCI-000366 - Implement the security configuration settings.

Weight

Fix Recommendation

Configure AlmaLinux OS 9 to enable hardening for the BPF JIT compiler.

Create a numbered *.conf file in /etc/sysctl.d/ with the following content:

net.core.bpf_jit_harden = 2

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

$ sysctl –system

Check Contents

Verify AlmaLinux OS 9 enables hardening for the BPF JIT with the following commands:

$ 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.

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

$ /usr/lib/systemd/systemd-sysctl --cat-config | egrep -v '^(#|;)' | grep -F net.core.bpf_jit_harden | tail -1

net.core.bpf_jit_harden = 2

If the network parameter "net.core.bpf_jit_harden" is not equal to "2" or nothing is returned, this is a finding.

Vulnerability Number

V-269273

Documentable

False

Rule Version

ALMA-09-021800

Severity Override Guidance

Check Content Reference

Target Key

5664