Intel has always maintained that Meltdown and Spectre only affected their processors from Nehalem onwards. Every list they released publicly has backed that up. However, we can now confirm that even the Intel Penryn CPUs are also vulnerable to Meltdown and Spectre.

 

Intel Penryn CPUs Also Vulnerable To Meltdown + Spectre

Every list Intel ever released on Meltdown and Spectre have only listed their CPUs from the Nehalem microarchitecture onwards. Although it was possible that the Intel Penryn microarchitecture was also affected, Intel conspicuously left them out of every list.

On 8 February 2018, Intel released a schedule of microcode updates meant to fix the random and spontaneous reboot problems they had with their Spectre 2 patches. Hidden in that schedule is the acknowledgement that the Intel Penryn microarchitecture was also vulnerable.

Those who have been tracking the Intel microcode updates will note that the Intel Penryn processors were not mentioned in the last update on 24 January 2018.

 

What Are The Intel Penryn CPUs Vulnerable To Meltdown + Spectre?

• Intel Penryn Server CPUs (96 CPU Models)
• Intel Penryn Desktop CPUs (91 CPU Models)
• Intel Penryn Mobile CPUs (127 CPU Models)

 

Meltdown + Spectre Reading Suggestions

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• Everything On The Meltdown + Spectre CPU Flaws!
• The Complete List Of CPUs Vulnerable To Meltdown / Spectre
• The Microsoft Spectre + Meltdown Patch Schedule
• The Intel Spectre Reboot Issue – Everything You Need To Know!
• Intel Penryn CPUs Also Vulnerable To Meltdown + Spectre
• The Complete AMD Spectre Mitigation Strategy Guide
• The Apple Spectre + Meltdown Patches Detailed
• These Windows 10 Updates Are Bricking AMD PCs!
• Pre-2016 Intel CPUs Hit Worst By Meltdown + Spectre Fix
• Yes, AMD CPUs Are Also Vulnerable To Spectre 2 Exploit
• AMD K10 And K8 Processors Also Vulnerable To Spectre
• KB3078130 : Emergency Windows Update To Disable Intel Spectre Patches!

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Intel Penryn Server CPUs Vulnerable To Meltdown + Spectre

Intel Yorkfield (2008-2009)

• Intel Xeon X3380
• Intel Xeon L3380
• Intel Xeon X3370
• Intel Xeon X3360
• Intel Xeon X3350

Intel Wolfdale (2008-2009)

• Intel Xeon E3120
• Intel Xeon E3110
• Intel Xeon L3110

Intel Dunnington (2008)

• Intel Xeon X7460
• Intel Xeon E7458
• Intel Xeon L7455
• Intel Xeon E7450
• Intel Xeon L7445
• Intel Xeon E7440
• Intel Xeon E7430
• Intel Xeon E7420

Intel Yorkfield-6M (2008)

• Intel Xeon X3330
• Intel Xeon X3320

Intel Yorkfield-CL (2008)

• Intel Xeon X3363
• Intel Xeon X3353
• Intel Xeon X3323
• Intel Xeon X3113
• Intel Xeon L3014

Intel Harpertown (2007-2008)

• Intel Xeon X5492
• Intel Xeon X5482
• Intel Xeon X5472
• Intel Xeon E5472
• Intel Xeon E5462
• Intel Xeon X5470
• Intel Xeon X5460
• Intel Xeon X5450
• Intel Xeon E5450
• Intel Xeon E5440
• Intel Xeon E5430
• Intel Xeon L5430
• Intel Xeon E5420
• Intel Xeon L5420
• Intel Xeon E5410
• Intel Xeon L5410
• Intel Xeon L5408
• Intel Xeon E5405

Intel Wolfdale-DP (2007-2008)

• Intel Xeon X5272
• Intel Xeon X5270
• Intel Xeon X5260
• Intel Xeon L5248
• Intel Xeon X5240
• Intel Xeon L5240
• Intel Xeon L5238
• Intel Xeon X5220
• Intel Xeon L5215
• Intel Xeon X5205

Intel Tigerton (2007)

• Intel Xeon X7350
• Intel Xeon L7345
• Intel Xeon E7340
• Intel Xeon E7330
• Intel Xeon E7320
• Intel Xeon E7310
• Intel Xeon E7220
• Intel Xeon E7210

Intel Kentsfield (2007)

• Intel Xeon X3230
• Intel Xeon X3220
• Intel Xeon X3210

Intel Allendale (2007)

• Intel Xeon 3050
• Intel Xeon 3040

Intel Clovertown (2006-2007)

• Intel Xeon X5365
• Intel Xeon X5355
• Intel Xeon X5350
• Intel Xeon E5350
• Intel Xeon E5345
• Intel Xeon E5340
• Intel Xeon E5335
• Intel Xeon L5335
• Intel Xeon E5330
• Intel Xeon E5320
• Intel Xeon L5320
• Intel Xeon L5318
• Intel Xeon E5310
• Intel Xeon L5310

Intel Conroe (2006-2007)

• Intel Xeon 3085
• Intel Xeon 3075
• Intel Xeon 3070
• Intel Xeon 3065
• Intel Xeon 3060
• Intel Xeon 3050
• Intel Xeon 3040

Intel Woodcrest (2006)

• Intel Xeon 5160
• Intel Xeon 5150
• Intel Xeon LV 5148
• Intel Xeon 5140
• Intel Xeon LV 5138
• Intel Xeon LV 5133
• Intel Xeon 5130
• Intel Xeon LV 5128
• Intel Xeon 5120
• Intel Xeon LV 5113
• Intel Xeon 5110

Next Page > Intel Penryn Desktop + Mobile CPUs Vulnerable To Meltdown + Spectre

 

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