RHEL 9 must enable mitigations against processor-based vulnerabilities.
An XCCDF Rule
Description
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
- ID
- SV-257795r1044845_rule
- Version
- RHEL-09-212050
- Severity
- Low
- References
- Updated
Remediation Templates
A 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:
GRUB_CMDLINE_LINUX="pti=on"