Detections
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1.19 RHEL-09-212050

Information

RHEL 9 must enable mitigations against processor-based vulnerabilities.

GROUP ID: V-257795
RULE ID: SV-257795r1044845

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

Solution

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"

See Also

https://workbench.cisecurity.org/benchmarks/22008

Item Details

Category: CONFIGURATION MANAGEMENT, SYSTEM AND INFORMATION INTEGRITY

References: 800-53|CM-7, 800-53|CM-7a., 800-53|SI-16, CAT|III, CCI|CCI-000381, CCI|CCI-002824, Rule-ID|SV-257795r1044845_rule, STIG-ID|RHEL-09-212050, Vuln-ID|V-257795

Plugin: Unix

Control ID: 51ab9845d9498bf38bfd25350146b8c4d4fc22f22906f3ac83094cb1cdeff424