Intel Processors CVE-2025-35973

The primary remediation path is to consult INTEL-SA-01428 at https://intel.com/content/www/us/en/security-center/advisory/intel-sa-01428.html to identify applicable microcode updates or BIOS/UEFI firmware updates for affected processor models, then deploy those updates through the OEM or system vendor's firmware update channel. Microcode updates for Intel processor vulnerabilities are typically delivered via BIOS/UEFI updates from the system OEM (Dell, HP, Lenovo, Supermicro, etc.) or via OS-level microcode loading packages (intel-microcode on Linux distributions). Because exact fixed microcode versions were not independently confirmed in the available intelligence data, organizations should not assume a fixed version without verifying against the advisory. As a compensating control for environments where immediate firmware update is not feasible, restricting Ring 0 code execution paths - such as disabling unsigned kernel module loading, enforcing Secure Boot, and limiting which principals can install or run kernel-mode software - raises the exploitation barrier. Note that these controls address privilege escalation prerequisites rather than the underlying processor flaw, and are not equivalent to patching. Side effect of microcode updates: potential minor performance impact in specific workloads; always validate in staging before production rollout.