high
7.5
Advisory Published
Updated

CVE-2021-26406

First published: Tue May 09 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.

Credit: psirt@amd.com psirt@amd.com

Affected SoftwareAffected VersionHow to fix
All of
AMD EPYC 7232p firmware=romepi_1.0.0.a
AMD EPYC 7232p firmware
All of
AMD EPYC 7252 Firmware=romepi_1.0.0.a
AMD EPYC 7252 Firmware
All of
AMD EPYC 7262 Firmware=romepi_1.0.0.a
AMD EPYC 7262 Firmware
All of
AMD EPYC 7272 firmware=romepi_1.0.0.a
AMD EPYC 7272 firmware
All of
AMD EPYC 7282 Firmware=romepi_1.0.0.a
AMD EPYC 7282
All of
Amd Epyc Server Firmware=romepi_1.0.0.a
AMD EPYC 7302P
All of
AMD EPYC 7302P Firmware=romepi_1.0.0.a
AMD EPYC 7302P
All of
AMD EPYC 7352 firmware=romepi_1.0.0.a
AMD EPYC 7352
All of
Amd Epyc Server Firmware=romepi_1.0.0.a
AMD EPYC 7402
All of
AMD EPYC 7402P Firmware=romepi_1.0.0.a
AMD EPYC 7402P
All of
AMD EPYC 7452 Firmware=romepi_1.0.0.a
AMD EPYC 7452
All of
Amd Epyc Server Firmware=romepi_1.0.0.a
AMD EPYC 7502
All of
AMD EPYC 7502P Firmware=romepi_1.0.0.a
AMD EPYC 7502P
All of
AMD EPYC 7532 Firmware=romepi_1.0.0.a
AMD EPYC 7532
All of
AMD EPYC 7542 Firmware=romepi_1.0.0.a
AMD EPYC 7542
All of
AMD EPYC 7552 Firmware=romepi_1.0.0.a
AMD EPYC Embedded 7552
All of
AMD EPYC 7642 Firmware=romepi_1.0.0.a
AMD EPYC 7642 Firmware
All of
AMD EPYC 7662 Firmware=romepi_1.0.0.a
AMD EPYC 7662
All of
AMD EPYC 7702 Firmware=romepi_1.0.0.a
AMD EPYC 7702
All of
AMD EPYC 7702 Firmware=romepi_1.0.0.a
AMD EPYC 7702p
All of
AMD EPYC 7742 firmware=romepi_1.0.0.a
AMD EPYC 7742 firmware
All of
AMD EPYC 7F32 Firmware=romepi_1.0.0.a
AMD EPYC 7F32 Firmware
All of
AMD EPYC 7F52 Firmware=romepi_1.0.0.a
AMD EPYC 7F52
All of
AMD EPYC 7F72 Firmware=romepi_1.0.0.a
AMD EPYC 7F72
All of
AMD EPYC 7H12 Firmware=romepi_1.0.0.a
AMD EPYC 7H12
All of
AMD EPYC 7251 Firmware=naplespi_1.0.0.e
AMD EPYC 7251
All of
AMD EPYC 7261 Firmware=naplespi_1.0.0.e
AMD Epyc 7261
All of
Amd Epyc Server Firmware=naplespi_1.0.0.e
AMD EPYC 7281 Firmware
All of
Amd Epyc Server Firmware=naplespi_1.0.0.e
AMD EPYC 7301 Firmware
All of
AMD EPYC 7351P Firmware=naplespi_1.0.0.e
AMD EPYC 7351P Firmware
All of
AMD EPYC 7351P Firmware=naplespi_1.0.0.e
AMD EPYC 7351P Firmware
All of
AMD EPYC 7371 Firmware=naplespi_1.0.0.e
AMD EPYC 7371 Firmware
All of
Amd Epyc Server Firmware=naplespi_1.0.0.e
AMD EPYC 7401
All of
AMD EPYC 7401P Firmware=naplespi_1.0.0.e
AMD EPYC 7401P
All of
AMD EPYC 7451 Firmware=naplespi_1.0.0.e
AMD EPYC 7451 Firmware
All of
AMD EPYC 7501 firmware=naplespi_1.0.0.e
AMD EPYC 7501
All of
Amd Epyc Server Firmware=naplespi_1.0.0.e
AMD EPYC 7551 Firmware
All of
AMD EPYC 7551P Firmware=naplespi_1.0.0.e
AMD EPYC 7551P Firmware
All of
Amd Epyc Server Firmware=naplespi_1.0.0.e
AMD EPYC 7571
All of
AMD EPYC 7601 Firmware=naplespi_1.0.0.e
AMD EPYC 7601 Firmware
AMD EPYC 7232p firmware=romepi_1.0.0.a
AMD EPYC 7232p firmware
AMD EPYC 7252 Firmware=romepi_1.0.0.a
AMD EPYC 7252 Firmware
AMD EPYC 7262 Firmware=romepi_1.0.0.a
AMD EPYC 7262 Firmware
AMD EPYC 7272 firmware=romepi_1.0.0.a
AMD EPYC 7272 firmware
AMD EPYC 7282 Firmware=romepi_1.0.0.a
AMD EPYC 7282
Amd Epyc Server Firmware=romepi_1.0.0.a
AMD EPYC 7302P
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 Server 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 Server 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 Embedded 7552
AMD EPYC 7642 Firmware=romepi_1.0.0.a
AMD EPYC 7642 Firmware
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 7702 Firmware=romepi_1.0.0.a
AMD EPYC 7702p
AMD EPYC 7742 firmware=romepi_1.0.0.a
AMD EPYC 7742 firmware
AMD EPYC 7F32 Firmware=romepi_1.0.0.a
AMD EPYC 7F32 Firmware
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 Server Firmware=naplespi_1.0.0.e
AMD EPYC 7281 Firmware
Amd Epyc Server Firmware=naplespi_1.0.0.e
AMD EPYC 7301 Firmware
AMD EPYC 7351P Firmware=naplespi_1.0.0.e
AMD EPYC 7351P Firmware
AMD EPYC 7351P Firmware=naplespi_1.0.0.e
AMD EPYC 7351P Firmware
AMD EPYC 7371 Firmware=naplespi_1.0.0.e
AMD EPYC 7371 Firmware
Amd Epyc Server 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 Firmware
AMD EPYC 7501 firmware=naplespi_1.0.0.e
AMD EPYC 7501
Amd Epyc Server Firmware=naplespi_1.0.0.e
AMD EPYC 7551 Firmware
AMD EPYC 7551P Firmware=naplespi_1.0.0.e
AMD EPYC 7551P Firmware
Amd Epyc Server Firmware=naplespi_1.0.0.e
AMD EPYC 7571
AMD EPYC 7601 Firmware=naplespi_1.0.0.e
AMD EPYC 7601 Firmware

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Reference Links

Frequently Asked Questions

  • 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.

  • 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.

  • Which systems are affected by CVE-2021-26406?

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

  • 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.

  • 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.

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