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Merge remote-tracking branch 'github-kicksecure/master'

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Patrick Schleizer 2025-09-17 13:32:44 -04:00
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README.md
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@ -178,6 +178,8 @@ CPU mitigations:
- Indirect Target Selection (ITS)
- VMScape
Boot parameters relating to kernel hardening, DMA mitigations, and entropy
generation are outlined in the `/etc/default/grub.d/40_kernel_hardening.cfg`
configuration file.

12
etc/default/grub.d/40_cpu_mitigations.cfg
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@ -167,7 +167,8 @@ GRUB_CMDLINE_LINUX="$GRUB_CMDLINE_LINUX kvm.mitigate_smt_rsb=1"
## https://www.kernel.org/doc/html/latest/admin-guide/hw-vuln/srso.html
##
## The default kernel setting will be utilized until provided sufficient evidence to modify.
## Using "spec_rstack_overflow=ipbp" may provide stronger security at a greater performance impact.
## Using "spec_rstack_overflow=ibpb" may provide superior protection to the default software-based approach.
## The use of hardware barriers may be more effective while possibly incurring a greater performance loss.
##
#GRUB_CMDLINE_LINUX="$GRUB_CMDLINE_LINUX spec_rstack_overflow=safe-ret"
@ -195,3 +196,12 @@ GRUB_CMDLINE_LINUX="$GRUB_CMDLINE_LINUX reg_file_data_sampling=on"
## https://www.kernel.org/doc/html/latest/admin-guide/hw-vuln/indirect-target-selection.html
##
GRUB_CMDLINE_LINUX="$GRUB_CMDLINE_LINUX indirect_target_selection=force"
## VMScape:
## Mitigate the vulnerability by flushing branch predictors before returning to userspace when exiting guests.
## Comprehensive protection may also require disabling SMT to limit cross-thread attacks.
## Currently affects both AMD and Intel CPUs.
##
## https://www.kernel.org/doc/html/latest/admin-guide/hw-vuln/vmscape.html
##
GRUB_CMDLINE_LINUX="$GRUB_CMDLINE_LINUX vmscape=force"