medium
6.5
CWE
345
Advisory Published
Updated

CVE-2021-26403

First published: Tue Jan 10 2023(Updated: )

Insufficient checks in SEV may lead to a malicious hypervisor disclosing the launch secret potentially resulting in compromise of VM confidentiality.

Credit: psirt@amd.com

Affected SoftwareAffected VersionHow to fix
Amd Epyc Server Firmware<naplespi_1.0.0.e
AMD EPYC 7001 Firmware
AMD EPYC 7251 Firmware<naplespi_1.0.0.e
AMD EPYC 7251 Firmware
AMD EPYC 7261 Firmware<naplespi_1.0.0.e
AMD EPYC 7261
Amd Epyc Server Firmware<naplespi_1.0.0.e
AMD EPYC Server
Amd Epyc Server Firmware<naplespi_1.0.0.e
AMD EPYC 7301 Firmware
AMD EPYC 7351P Firmware<naplespi_1.0.0.e
AMD EPYC 7351 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 7401P Firmware<naplespi_1.0.0.e
AMD EPYC 7401 Firmware
AMD EPYC 7401P Firmware<naplespi_1.0.0.e
AMD EPYC 7401P Firmware
AMD EPYC 7451 Firmware<naplespi_1.0.0.e
AMD EPYC 7451 Firmware
AMD EPYC 7501 Firmware<naplespi_1.0.0.e
AMD EPYC Server
AMD EPYC 7551P 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 7601 Firmware<naplespi_1.0.0.e
AMD EPYC 7601 Firmware
AMD EPYC 7002 Firmware<romepi_1.0.0.9
AMD EPYC Server
AMD EPYC 7232p firmware<romepi_1.0.0.9
AMD EPYC 7232p firmware
AMD EPYC 7252 Firmware<romepi_1.0.0.9
AMD EPYC 7252 Firmware
AMD EPYC 7262 Firmware<romepi_1.0.0.9
AMD EPYC 7262 Firmware
AMD EPYC 7272 firmware<romepi_1.0.0.9
AMD EPYC 7272 firmware
AMD EPYC 7282 Firmware<romepi_1.0.0.9
AMD EPYC 7282 Firmware
Amd Epyc Server Firmware<romepi_1.0.0.9
AMD EPYC 7302 Firmware
AMD EPYC 7302P Firmware<romepi_1.0.0.9
AMD EPYC 7302P Firmware
AMD EPYC Firmware<romepi_1.0.0.9
AMD EPYC 7352 firmware
Amd Epyc Server Firmware<romepi_1.0.0.9
AMD EPYC 7402 Firmware
AMD EPYC 7402P Firmware<romepi_1.0.0.9
AMD EPYC 7402P Firmware
AMD EPYC 7452 Firmware<romepi_1.0.0.9
AMD EPYC Server
AMD EPYC 7502 Firmware<romepi_1.0.0.9
AMD EPYC 7502 firmware
AMD EPYC 7502P Firmware<romepi_1.0.0.9
AMD EPYC 7502P Firmware
AMD EPYC 7532 Firmware<romepi_1.0.0.9
AMD EPYC 7532 Firmware
AMD EPYC 7542 Firmware<romepi_1.0.0.9
AMD EPYC Server
AMD EPYC 7552 Firmware<romepi_1.0.0.9
AMD EPYC 7552 Firmware
AMD EPYC 7642 Firmware<romepi_1.0.0.9
AMD EPYC 7642 Firmware
AMD EPYC 7662 Firmware<romepi_1.0.0.9
AMD EPYC 7662 Firmware
AMD EPYC 7702p firmware<romepi_1.0.0.9
AMD EPYC Server
AMD EPYC 7702 Firmware<romepi_1.0.0.9
AMD EPYC 7702P
AMD EPYC 7742 Firmware<romepi_1.0.0.9
AMD EPYC Server
AMD EPYC 7F32 Firmware<romepi_1.0.0.9
AMD EPYC 7F32 Firmware
AMD EPYC 7F52 Firmware<romepi_1.0.0.9
AMD EPYC 7F52 Firmware
AMD EPYC 7F72<romepi_1.0.0.9
AMD EPYC 7F72 Firmware
AMD EPYC 7H12 Firmware<romepi_1.0.0.9
AMD EPYC 7H12 Firmware
All of
Amd Epyc Server Firmware<naplespi_1.0.0.e
AMD EPYC 7001 Firmware
All of
AMD EPYC 7251 Firmware<naplespi_1.0.0.e
AMD EPYC 7251 Firmware
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 Server
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 7351 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 7401P Firmware<naplespi_1.0.0.e
AMD EPYC 7401 Firmware
All of
AMD EPYC 7401P Firmware<naplespi_1.0.0.e
AMD EPYC 7401P Firmware
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 Server
All of
AMD EPYC 7551P 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 7601 Firmware<naplespi_1.0.0.e
AMD EPYC 7601 Firmware
All of
AMD EPYC 7002 Firmware<romepi_1.0.0.9
AMD EPYC Server
All of
AMD EPYC 7232p firmware<romepi_1.0.0.9
AMD EPYC 7232p firmware
All of
AMD EPYC 7252 Firmware<romepi_1.0.0.9
AMD EPYC 7252 Firmware
All of
AMD EPYC 7262 Firmware<romepi_1.0.0.9
AMD EPYC 7262 Firmware
All of
AMD EPYC 7272 firmware<romepi_1.0.0.9
AMD EPYC 7272 firmware
All of
AMD EPYC 7282 Firmware<romepi_1.0.0.9
AMD EPYC 7282 Firmware
All of
Amd Epyc Server Firmware<romepi_1.0.0.9
AMD EPYC 7302 Firmware
All of
AMD EPYC 7302P Firmware<romepi_1.0.0.9
AMD EPYC 7302P Firmware
All of
AMD EPYC Firmware<romepi_1.0.0.9
AMD EPYC 7352 firmware
All of
Amd Epyc Server Firmware<romepi_1.0.0.9
AMD EPYC 7402 Firmware
All of
AMD EPYC 7402P Firmware<romepi_1.0.0.9
AMD EPYC 7402P Firmware
All of
AMD EPYC 7452 Firmware<romepi_1.0.0.9
AMD EPYC Server
All of
AMD EPYC 7502 Firmware<romepi_1.0.0.9
AMD EPYC 7502 firmware
All of
AMD EPYC 7502P Firmware<romepi_1.0.0.9
AMD EPYC 7502P Firmware
All of
AMD EPYC 7532 Firmware<romepi_1.0.0.9
AMD EPYC 7532 Firmware
All of
AMD EPYC 7542 Firmware<romepi_1.0.0.9
AMD EPYC Server
All of
AMD EPYC 7552 Firmware<romepi_1.0.0.9
AMD EPYC 7552 Firmware
All of
AMD EPYC 7642 Firmware<romepi_1.0.0.9
AMD EPYC 7642 Firmware
All of
AMD EPYC 7662 Firmware<romepi_1.0.0.9
AMD EPYC 7662 Firmware
All of
AMD EPYC 7702p firmware<romepi_1.0.0.9
AMD EPYC Server
All of
AMD EPYC 7702 Firmware<romepi_1.0.0.9
AMD EPYC 7702P
All of
AMD EPYC 7742 Firmware<romepi_1.0.0.9
AMD EPYC Server
All of
AMD EPYC 7F32 Firmware<romepi_1.0.0.9
AMD EPYC 7F32 Firmware
All of
AMD EPYC 7F52 Firmware<romepi_1.0.0.9
AMD EPYC 7F52 Firmware
All of
AMD EPYC 7F72<romepi_1.0.0.9
AMD EPYC 7F72 Firmware
All of
AMD EPYC 7H12 Firmware<romepi_1.0.0.9
AMD EPYC 7H12 Firmware

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Reference Links

Frequently Asked Questions

  • What is the severity of CVE-2021-26403?

    CVE-2021-26403 has been assigned a medium severity rating due to the potential compromise of virtual machine confidentiality.

  • How do I fix CVE-2021-26403?

    To mitigate CVE-2021-26403, update the affected firmware to the latest version available from AMD.

  • Which systems are affected by CVE-2021-26403?

    CVE-2021-26403 affects various AMD EPYC 7001 and 7002 series firmware versions up to specific release versions.

  • What could happen if CVE-2021-26403 is exploited?

    Exploitation of CVE-2021-26403 might allow a malicious hypervisor to disclose sensitive launch secrets, compromising the confidentiality of virtual machines.

  • Is there a known exploit for CVE-2021-26403?

    As of now, there are no publicly known exploits for CVE-2021-26403, but the vulnerability remains a security risk.

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