MEDIUM M23: Kernel Sysctl Extended P3

Overview

Additional kernel hardening parameters beyond M2. Disables kexec (prevents kernel replacement at runtime), restricts perf_event access, and controls core dump file naming.

Profile: NIST 800-53 Moderate (rhcos4-moderate)

Compliance Checks

Check Description
kernel.kexec_load_disabled=1 Disable kexec kernel loading
kernel.perf_event_paranoid=2 Restrict perf_event to root only
kernel.core_pattern=|/bin/false Disable core dump processing

Verification

oc debug node/<node> -- chroot /host sysctl kernel.kexec_load_disabled kernel.perf_event_paranoid kernel.core_pattern
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