Security Software

Processors Affected: Machine Check Error Avoidance on Page Size Change

Intel expects the following processors are affected by the Machine Check Error Avoidance on Page Size Change issue. Refer to Deep Dive: Machine Check Error Avoidance on Page Size Change for further details.

List of processors affected by Machine Check Error Avoidance on Page Size Change (CVE-2018-12207)
Family_Model Affected
processor Families / Processor Number Series
06_2EH Intel® Xeon® processor 7500, 6500 series (Nehalem-EX)
06_1EH, 06_1FH Intel® Core™ i7 and i5 Processors (Nehalem, Nehalem-G)
06_1AH Intel Core i7 Processor, Intel Xeon processor 3400, 3500, 5500 series (Nehalem-EP)
06_2FH Intel Xeon Processor E7 Family (Westmere-EX)
06_25H, 06_2CH Intel Xeon processors 3600, 5600 series, Intel Core i7, i5 and i3 Processors (Westmere, Westmere-EP)
06_2AH 2nd generation Intel Core Processors (Sandy Bridge)
06_2DH Intel Xeon processor E5 Family based on Intel microarchitecture code name Sandy Bridge, Intel Core i7-39xx Processor Extreme Edition
06_2DH Intel Xeon processor E3-1200 product family; 2nd Generation Intel Core i7, i5, i3 Processors 2xxx Series (Sandy Bridge)
06_3AH 3rd generation Intel® Core™ Processors (Ivy Bridge)
06_3EH Intel Xeon processor E7-8800/4800/2800 v2 product families based on Ivy Bridge-E microarchitecture
06_3EH Intel Xeon processor E5-2600/1600 v2 product families and Intel Xeon processor E5-2400 v2 product family based on Ivy Bridge-E microarchitecture, Intel Core i7-49xx Processor Extreme Edition
06_9EH Intel Xeon-E 2100
06_3AH 3rd Generation Intel Core Processor and Intel Xeon processor E3-1200 v2 product family based on Ivy Bridge microarchitecture
06_3FH Intel Xeon processor E5-4600/2600/1600 v3 product families, Intel Xeon processor E7 v3 product families based on Haswell-E microarchitecture, Intel Core i7-59xx Processor Extreme Edition
06_3CH, 06_45H, 06_46H 4th Generation Intel Core processor and Intel Xeon processor E3-1200 v3 product family based on Haswell microarchitecture
06_3FH, 06_4FH Intel® Core™ X-series Processor family for Intel® X99 platforms
06_56H Intel Xeon processor D-1500 product family based on Broadwell microarchitecture
06_4FH Intel Xeon processor E5 v4 Family based on Broadwell microarchitecture, Intel Xeon processor E7 v4 Family, Intel Core i7-69xx Processor Extreme Edition
06_47H 5th generation Intel Core processors, Intel Xeon processor E3-1200 v4 product family based on Broadwell microarchitectur
06_3DH Intel Core M-5xxx Processor, 5th generation Intel Core processors based on Broadwell microarchitecture
06_55H Intel® Xeon® Processor Scalable Family based on Skylake microarchitecture
06_55H Skylake-D
06_9EH, 06_55H Intel® Core™ X-series Processor family for Intel® X299 platforms
06_4EH, 06_5EH 6th generation Intel Core processors and Intel Xeon processor E3-1500m v5 product family and E3- 1200 v5 product family based on Skylake microarchitecture
06_9EH Kaby Lake E3-1200 v6
06_8EH, 06_9EH 7th/8th generation Intel® Core™ processors based on Kaby/Coffee Lake microarchitecture
06_9EH Coffee Lake
06_8EH Whiskey Lake(ULT)
06_8EH Whiskey Lake (ULT refresh)
06_9EH Whiskey Lake (Desktop)
06_55H Cascade Lake

Unaffected processors

The following is a list of unaffected processors in Family 0x6 that may not have IA32_ARCH_CAPABILITIES[IF_PSCHANGE_MC_NO] enumeration.

Instead of checking the list of the affected CPU list, a software algorithm can use the following unaffected CPU list to determine a mitigation is necessary. The pseudocode below describes a modified algorithm.

 	CPU is not vulnerable; no mitigation needed
} else if ( == 0x6 && CPUID == Not_in_unaffected_list)
 	CPU is vulnerable
Use SW mitigation if needed
Unaffected processors
Family_Model Unaffected Processor Families /
Processor Number Series
Atom (Bonnell, Saltwell, Silvermont, Airmont Goldmont, GoldmontPlus)
Knights family

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