TOSS 5 must enable mitigations against processor-based vulnerabilities.
Severity | Group ID | Group Title | Version | Rule ID | Date | STIG Version |
|---|---|---|---|---|---|---|
| low | V-282473 | SRG-OS-000095-GPOS-00049 | TOSS-05-000032 | SV-282473r1200399_rule | 2026-04-01 | 1 |
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-000095-GPOS-00049, SRG-OS-000433-GPOS-00193
ℹ️ Check
Verify TOSS 5 enables kernel page-table isolation using the following command:
$ sudo grubby --info=ALL | grep pti
args="ro crashkernel=auto resume=/dev/mapper/rhel-swap rd.lvm.lv=rhel/root rd.lvm.lv=rhel/swap rhgb quiet fips=1 audit=1 audit_backlog_limit=8192 pti=on
If the "pti" entry does not equal "on" or is missing, this is a finding.
✔️ Fix
Configure TOSS 5 to enable kernel page-table isolation using 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"