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ALMA-09-044680 - AlmaLinux OS 9 must enable mitigations against processor-based vulnerabilities.
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).Solution
Configure AlmaLinux OS 9 to enable kernel page-table isolation with the following command:$ 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_CL_AlmaLinux_OS_9_V1R6_STIG.zip
Item Details
Audit Name: DISA Cloud Linux AlmaLinux OS 9 STIG v1r6
Category: SYSTEM AND INFORMATION INTEGRITY
References: 800-53|SI-16, CAT|II, CCI|CCI-002824, Rule-ID|SV-269450r1050333_rule, STIG-ID|ALMA-09-044680, Vuln-ID|V-269450
Plugin: Unix
Control ID: c112f400541786217c54e3ebfed768fc6d9b825ff8bc078ec1ef73f44c96504a