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Linux RHEL-10-701060

DISA STIG RHEL-10-701060 (CAT II): RHEL 10 must restrict exposed kernel pointer address access.

DISA STIG recommends

RHEL-10-701060 CAT II

RHEL 10 must restrict exposed kernel pointer address access.

NIST SP 800-53: SC-2, SI-16

Check

Verify RHEL 10 is configured to restrict exposed kernel pointer address access. Verify the runtime status of the "kernel.kptr_restrict" kernel parameter with the following command: $ sudo sysctl kernel.kptr_restrict kernel.kptr_restrict = 1 If "kernel.kptr_restrict" is not set to "1" or is missing, this is a finding.

Fix

Configure RHEL 10 to restrict exposed kernel pointer address access. Create a drop-in if it does not already exist: $ sudo vi /etc/sysctl.d/99-kernel_kptr_restrict.conf Add the following to the file: kernel.kptr_restrict = 1 Reload settings from all system configuration files with the following command: $ sudo sysctl --system

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