Processors Affected: Special Register Buffer Data Sampling

Published: 06/09/2020

In general, Intel® Core™ family microarchitecture client and Intel® Xeon® E3 processors that implement RDRAND and/or RDSEED and are affected by either Microarchitectural Fill Buffer Data Sampling (MFBDS) or Intel® Transactional Synchronization Extensions (Intel® TSX) Asynchronous Abort may also be affected by Special Register Buffer Data Sampling (SRBDS). Refer to the technical documentation for further details. 

More precisely, a processor is affected by SRBDS if its Family_Model and stepping is marked as affected in the following table, with the exception of the specifically marked processors exporting MDS_NO while Intel TSX is available yet not enabled. The latter class of processors are only affected when Intel TSX is enabled by software using TSX_CTRL_MSR, otherwise they are not affected.

Processors marked with † may support Intel® Software Guard Extensions (Intel® SGX).

Processors Potentially Affected by SRBDS
Family_Model Step Processor Families /
Processor Number Series
Affected
06_3AH  All 3rd Generation Intel® Core™ i7 and i5 processor families based on Ivy Bridge microarchitecture Yes
06_3FH All Intel Xeon processor E5-4600/2600/1600 v3 product families, and Intel Xeon processor E7 v3 product families Intel Core i7-59xx Processor Extreme Edition based on Haswell-E microarchitecture No
06_3CH,
06_45H,
06_46H
All 4th Generation Intel Core processor and Intel Xeon processor E3-1200 v3 product family based on Haswell microarchitecture Yes
06_56H All Intel Xeon processor D-1500 product family based on Broadwell microarchitecture No
06_4FH All Intel Xeon processor E5 v4 Family based on Broadwell microarchitecture, Intel Xeon processor E7 v4 Family, Intel Core i7-69xx Processor Extreme Edition based on Broadwell-E microarchitecture No
06_47H All 5th Generation Intel Core processors, Intel Xeon processor E3-1200 v4 product family based on Broadwell microarchitecture Yes
06_3DH All Intel Core M-5xxx Processor, 5th Generation Intel Core processors based on Broadwell microarchitecture Yes
06_55H <=4 First Generation Intel Xeon Scalable Processor Family based on Skylake microarchitecture No
06_55H 5-7 Second Generation Intel Xeon Scalable Processor Family based on Cascade Lake microarchitecture No
06_4EH,
06_5EH
All 6th Generation Intel Core processors and Intel Xeon processor E3-1500m v5 product family and E3- 1200 v5 product family based on Skylake microarchitecture† Yes
06_8EH <=A 7th/8th Generation Intel Core processors, Intel Xeon processor E3 v6 product family and Intel Xeon-E Processor product family based on Kaby Lake/Coffee Lake microarchitectures† Yes
06_9EH <=B 7th/8th Generation Intel Core processors based on Kaby Lake/Coffee Lake microarchitecture† Yes
06_9EH 0xC 8th/9th Generation Intel Core processors, Intel® Pentium® processors, and Intel Xeon E processor family based on Coffee Lake microarchitecture† Yes
06_8EH 0xB 8th Generation Intel Core i7 Processors, Intel Pentium Gold Processor Series, and Intel® Celeron® Processor 4000 Series based on Whiskey Lake (ULT, refresh and desktop) microarchitecture† Yes
06_8EH 0xC 8th Generation Intel Core i7 Processors, Intel Pentium Gold Processor Series, and Intel® Celeron® Processor 4000 Series based on Whiskey Lake (ULT, refresh and desktop) microarchitecture†
8th/10th Generation Intel Core processors based on Amber Lake Y†
Yes
06_9EH 0xD Intel Xeon E-2200 Processor product family based on Coffee Lake-R microarchitecture† Yes
06_A5H,
06_A6H
All 10th Generation Intel Core Processors product family based on Comet Lake No
06_7DH,
06_7EH
All 10th Generation Intel Core processors based on Ice Lake microarchitecture† No
06_4CH,
06_5CH
06_37H,
06_4AH,
06_4DH,
06_5AH,
06_5DH,
06_6EH,
06_65H,
06_75H
All Intel Atom® (Silvermont, Airmont) No
06_5CH,
06_5FH,
06_7AH
All Intel Atom (Goldmont, GoldmontPlus†) No
06_86H All Intel Atom P5900 (Tremont) No
06_57H,
06_85H
All Intel® Xeon Phi™ x200 and 72x5 product families based on Knights Landing and Knights Mill microarchitectures No

 

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Product and Performance Information

1

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