kernel parameter gather_data_sampling=force
is likely causing this on some CPUs on Debian bookworm based operating systems.
Solution: Comment out gather_data_sampling=force
in the /etc/default/grub.d/40_cpu_mitigations.cfg
configuration file and reboot.
Comment out explanation: Commenting Syntax and Effects
sudo str_replace 'GRUB_CMDLINE_LINUX="$GRUB_CMDLINE_LINUX gather_data_sampling=force"' '#GRUB_CMDLINE_LINUX="$GRUB_CMDLINE_LINUX gather_data_sampling=force"' /etc/default/grub.d/40_cpu_mitigations.cfg