Intel expects the following processors are affected by the Machine Check Error Avoidance on Page Size Change issue. Refer to Machine Check Error Avoidance on Page Size Change for further details.
| 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.
If (CPUID.(EAX=07H,ECX=0H).EDX[29] == 1 && IA32_ARCH_CAPABILITIES[IF_PSCHANGE_MC_NO] == 1) {
CPU is not vulnerable; no mitigation needed
} else if (CPUID.family == 0x6 && CPUID == Not_in_unaffected_list)
CPU is vulnerable
Use SW mitigation if needed
}
Unaffected processors
| Family_Model | Unaffected Processor Families / Processor Number Series |
|---|---|
| 06_26H 06_27H 06_35H 06_36H 06_37H 06_86H 06_1CH 06_4AH 06_4CH 06_4DH 06_5AH 06_5CH 06_5DH 06_5FH 06_6EH 06_7AH |
Atom (Bonnell, Saltwell, Silvermont, Airmont Goldmont, GoldmontPlus) |
| 06_57H 06_85H |
Knights family |
Software Security Guidance Home | Advisory Guidance | Technical Documentation | Best Practices | Resources