CVE-2021-26406: High severity amd epyc 7232p firmware vulnerability

Published May 9, 2023
·
Updated

Insufficient validation in parsing Owner's Certificate Authority (OCA) certificates in SEV (AMD Secure Encrypted Virtualization) and SEV-ES user application can lead to a host crash potentially resulting in denial of service.

Affected Software

160 affected components
All of the following
AMD Epyc 7232p Firmware=romepi_1.0.0.a
AMD Epyc 7232p
All of the following
AMD Epyc 7252 Firmware=romepi_1.0.0.a
AMD Epyc 7252
All of the following
AMD Epyc 7262 Firmware=romepi_1.0.0.a
AMD Epyc 7262
All of the following
AMD Epyc 7272 Firmware=romepi_1.0.0.a
AMD Epyc 7272
All of the following
AMD Epyc 7282 Firmware=romepi_1.0.0.a
AMD Epyc 7282
All of the following
AMD Epyc 7302 Firmware=romepi_1.0.0.a
AMD Epyc 7302
All of the following
AMD Epyc 7302p Firmware=romepi_1.0.0.a
AMD Epyc 7302p
All of the following
AMD Epyc 7352 Firmware=romepi_1.0.0.a
AMD Epyc 7352
All of the following
AMD Epyc 7402 Firmware=romepi_1.0.0.a
AMD Epyc 7402
All of the following
AMD Epyc 7402p Firmware=romepi_1.0.0.a
AMD Epyc 7402p
All of the following
AMD Epyc 7452 Firmware=romepi_1.0.0.a
AMD Epyc 7452
All of the following
AMD Epyc 7502 Firmware=romepi_1.0.0.a
AMD Epyc 7502
All of the following
AMD Epyc 7502p Firmware=romepi_1.0.0.a
AMD Epyc 7502p
All of the following
AMD Epyc 7532 Firmware=romepi_1.0.0.a
AMD Epyc 7532
All of the following
AMD Epyc 7542 Firmware=romepi_1.0.0.a
AMD Epyc 7542
All of the following
AMD Epyc 7552 Firmware=romepi_1.0.0.a
AMD Epyc 7552
All of the following
AMD Epyc 7642 Firmware=romepi_1.0.0.a
AMD Epyc 7642
All of the following
AMD Epyc 7662 Firmware=romepi_1.0.0.a
AMD Epyc 7662
All of the following
AMD Epyc 7702 Firmware=romepi_1.0.0.a
AMD Epyc 7702
All of the following
AMD Epyc 7702p Firmware=romepi_1.0.0.a
AMD Epyc 7702p
All of the following
AMD Epyc 7742 Firmware=romepi_1.0.0.a
AMD Epyc 7742
All of the following
AMD Epyc 7f32 Firmware=romepi_1.0.0.a
AMD Epyc 7f32
All of the following
AMD Epyc 7f52 Firmware=romepi_1.0.0.a
AMD Epyc 7f52
All of the following
AMD Epyc 7f72 Firmware=romepi_1.0.0.a
AMD Epyc 7f72
All of the following
AMD Epyc 7h12 Firmware=romepi_1.0.0.a
AMD Epyc 7h12
All of the following
AMD Epyc 7251 Firmware=naplespi_1.0.0.e
AMD Epyc 7251
All of the following
AMD Epyc 7261 Firmware=naplespi_1.0.0.e
AMD Epyc 7261
All of the following
AMD Epyc 7281 Firmware=naplespi_1.0.0.e
AMD Epyc 7281
All of the following
AMD Epyc 7301 Firmware=naplespi_1.0.0.e
AMD Epyc 7301
All of the following
AMD Epyc 7351 Firmware=naplespi_1.0.0.e
AMD Epyc 7351
All of the following
AMD Epyc 7351p Firmware=naplespi_1.0.0.e
AMD Epyc 7351p
All of the following
AMD Epyc 7371 Firmware=naplespi_1.0.0.e
AMD Epyc 7371
All of the following
AMD Epyc 7401 Firmware=naplespi_1.0.0.e
AMD Epyc 7401
All of the following
AMD Epyc 7401p Firmware=naplespi_1.0.0.e
AMD Epyc 7401p
All of the following
AMD Epyc 7451 Firmware=naplespi_1.0.0.e
AMD Epyc 7451
All of the following
AMD Epyc 7501 Firmware=naplespi_1.0.0.e
AMD Epyc 7501
All of the following
AMD Epyc 7551 Firmware=naplespi_1.0.0.e
AMD Epyc 7551
All of the following
AMD Epyc 7551p Firmware=naplespi_1.0.0.e
AMD Epyc 7551p
All of the following
AMD Epyc 7571 Firmware=naplespi_1.0.0.e
AMD Epyc 7571
All of the following
AMD Epyc 7601 Firmware=naplespi_1.0.0.e
AMD Epyc 7601
AMD Epyc 7232p Firmware=romepi_1.0.0.a
AMD Epyc 7232p
AMD Epyc 7252 Firmware=romepi_1.0.0.a
AMD Epyc 7252
AMD Epyc 7262 Firmware=romepi_1.0.0.a
AMD Epyc 7262
AMD Epyc 7272 Firmware=romepi_1.0.0.a
AMD Epyc 7272
AMD Epyc 7282 Firmware=romepi_1.0.0.a
AMD Epyc 7282
AMD Epyc 7302 Firmware=romepi_1.0.0.a
AMD Epyc 7302
AMD Epyc 7302p Firmware=romepi_1.0.0.a
AMD Epyc 7302p
AMD Epyc 7352 Firmware=romepi_1.0.0.a
AMD Epyc 7352
AMD Epyc 7402 Firmware=romepi_1.0.0.a
AMD Epyc 7402
AMD Epyc 7402p Firmware=romepi_1.0.0.a
AMD Epyc 7402p
AMD Epyc 7452 Firmware=romepi_1.0.0.a
AMD Epyc 7452
AMD Epyc 7502 Firmware=romepi_1.0.0.a
AMD Epyc 7502
AMD Epyc 7502p Firmware=romepi_1.0.0.a
AMD Epyc 7502p
AMD Epyc 7532 Firmware=romepi_1.0.0.a
AMD Epyc 7532
AMD Epyc 7542 Firmware=romepi_1.0.0.a
AMD Epyc 7542
AMD Epyc 7552 Firmware=romepi_1.0.0.a
AMD Epyc 7552
AMD Epyc 7642 Firmware=romepi_1.0.0.a
AMD Epyc 7642
AMD Epyc 7662 Firmware=romepi_1.0.0.a
AMD Epyc 7662
AMD Epyc 7702 Firmware=romepi_1.0.0.a
AMD Epyc 7702
AMD Epyc 7702p Firmware=romepi_1.0.0.a
AMD Epyc 7702p
AMD Epyc 7742 Firmware=romepi_1.0.0.a
AMD Epyc 7742
AMD Epyc 7f32 Firmware=romepi_1.0.0.a
AMD Epyc 7f32
AMD Epyc 7f52 Firmware=romepi_1.0.0.a
AMD Epyc 7f52
AMD Epyc 7f72 Firmware=romepi_1.0.0.a
AMD Epyc 7f72
AMD Epyc 7h12 Firmware=romepi_1.0.0.a
AMD Epyc 7h12
AMD Epyc 7251 Firmware=naplespi_1.0.0.e
AMD Epyc 7251
AMD Epyc 7261 Firmware=naplespi_1.0.0.e
AMD Epyc 7261
AMD Epyc 7281 Firmware=naplespi_1.0.0.e
AMD Epyc 7281
AMD Epyc 7301 Firmware=naplespi_1.0.0.e
AMD Epyc 7301
AMD Epyc 7351 Firmware=naplespi_1.0.0.e
AMD Epyc 7351
AMD Epyc 7351p Firmware=naplespi_1.0.0.e
AMD Epyc 7351p
AMD Epyc 7371 Firmware=naplespi_1.0.0.e
AMD Epyc 7371
AMD Epyc 7401 Firmware=naplespi_1.0.0.e
AMD Epyc 7401
AMD Epyc 7401p Firmware=naplespi_1.0.0.e
AMD Epyc 7401p
AMD Epyc 7451 Firmware=naplespi_1.0.0.e
AMD Epyc 7451
AMD Epyc 7501 Firmware=naplespi_1.0.0.e
AMD Epyc 7501
AMD Epyc 7551 Firmware=naplespi_1.0.0.e
AMD Epyc 7551
AMD Epyc 7551p Firmware=naplespi_1.0.0.e
AMD Epyc 7551p
AMD Epyc 7571 Firmware=naplespi_1.0.0.e
AMD Epyc 7571
AMD Epyc 7601 Firmware=naplespi_1.0.0.e
AMD Epyc 7601

Event History

May 9, 2023
CVE Published
via MITRE·06:59 PM
Data Sourced
via MITRE·06:59 PM
Description
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Frequently Asked Questions

1

What is the severity of CVE-2021-26406?

CVE-2021-26406 is classified as a potential denial of service vulnerability due to host crashes caused by insufficient validation in parsing Owner's Certificate Authority (OCA) certificates.

2

How do I fix CVE-2021-26406?

To fix CVE-2021-26406, update the firmware to a version that addresses this vulnerability, specifically versions later than romepi_1.0.0.a.

3

Which systems are affected by CVE-2021-26406?

CVE-2021-26406 affects multiple Amd Epyc firmware versions specifically using romepi_1.0.0.a.

4

Can CVE-2021-26406 lead to data loss?

While CVE-2021-26406 primarily poses a risk of denial of service, host crashes may indirectly lead to data loss if not handled properly.

5

Is there a workaround for CVE-2021-26406?

Currently, the recommended approach for CVE-2021-26406 is to apply the necessary firmware updates, as no specific workaround is available.

Company

Resources

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