RHEL 9 must enable mitigations against processor-based vulnerabilities.
An XCCDF Rule
Description
<VulnDiscussion>Kernel page-table isolation is a kernel feature that mitigates the Meltdown security vulnerability and hardens the kernel against attempts to bypass kernel address space layout randomization (KASLR). Satisfies: SRG-OS-000433-GPOS-00193, SRG-OS-000095-GPOS-00049</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>
- ID
- SV-257795r925372_rule
- Severity
- Low
- References
- Updated
Remediation - Manual Procedure
Configure RHEL 9 to enable kernel page-table isolation with the following command:
$ sudo grubby --update-kernel=ALL --args="pti=on"
Add or modify the following line in "/etc/default/grub" to ensure the configuration survives kernel updates: