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RHEL-09-212050 - RHEL 9 must enable mitigations against processor-based vulnerabilities.

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Information

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://dl.dod.cyber.mil/wp-content/uploads/stigs/zip/U_RHEL_9_V2R7_STIG.zip

Item Details

References: 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: 11dba2193b64b365915e3192abc0ba6d81f68668539033ef3e7ac4a2e39d88e6