CVE-2021-26402: High severity amd epyc 7h12 firmware vulnerability

Published Jan 10, 2023
·
Updated

Insufficient bounds checking in ASP (AMD Secure Processor) firmware while handling BIOS mailbox commands, may allow an attacker to write partially-controlled data out-of-bounds to SMM or SEV-ES regions which may lead to a potential loss of integrity and availability.

Affected Software

200 affected components
AMD Epyc 7h12 Firmware<romepi_1.0.0.c
AMD Epyc 7h12
AMD Epyc 7f72 Firmware<romepi_1.0.0.c
AMD Epyc 7f72
AMD Epyc 7f52 Firmware<romepi_1.0.0.c
AMD Epyc 7f52
AMD Epyc 7f32 Firmware<romepi_1.0.0.c
AMD Epyc 7f32
AMD Epyc 7742 Firmware<romepi_1.0.0.c
AMD Epyc 7742
AMD Epyc 7702p Firmware<romepi_1.0.0.c
AMD Epyc 7702p
AMD Epyc 7702 Firmware<romepi_1.0.0.c
AMD Epyc 7702
AMD Epyc 7662 Firmware<romepi_1.0.0.c
AMD Epyc 7662
AMD Epyc 7642 Firmware<romepi_1.0.0.c
AMD Epyc 7642
AMD Epyc 7552 Firmware<romepi_1.0.0.c
AMD Epyc 7552
AMD Epyc 7542 Firmware<romepi_1.0.0.c
AMD Epyc 7542
AMD Epyc 7532 Firmware<romepi_1.0.0.c
AMD Epyc 7532
AMD Epyc 7502p Firmware<romepi_1.0.0.c
AMD Epyc 7502p
AMD Epyc 7502 Firmware<romepi_1.0.0.c
AMD Epyc 7502
AMD Epyc 7452 Firmware<romepi_1.0.0.c
AMD Epyc 7452
AMD Epyc 7402 Firmware<romepi_1.0.0.c
AMD Epyc 7402
AMD Epyc 7402p Firmware<romepi_1.0.0.c
AMD Epyc 7402p
AMD Epyc 7352 Firmware<romepi_1.0.0.c
AMD Epyc 7352
AMD Epyc 7302p Firmware<romepi_1.0.0.c
AMD Epyc 7302p
AMD Epyc 7302 Firmware<romepi_1.0.0.c
AMD Epyc 7302
AMD Epyc 7282 Firmware<romepi_1.0.0.c
AMD Epyc 7282
AMD Epyc 7272 Firmware<romepi_1.0.0.c
AMD Epyc 7272
AMD Epyc 7262 Firmware<romepi_1.0.0.c
AMD Epyc 7262
AMD Epyc 7252 Firmware<romepi_1.0.0.c
AMD Epyc 7252
AMD Epyc 7232p Firmware<romepi_1.0.0.c
AMD Epyc 7232p
AMD Epyc 7002 Firmware<romepi_1.0.0.c
AMD Epyc 7002
AMD Epyc 7003 Firmware<milanpi_1.0.0.4
AMD Epyc 7003
AMD Epyc 72f3 Firmware<milanpi_1.0.0.4
AMD Epyc 72f3
AMD Epyc 7313 Firmware<milanpi_1.0.0.4
AMD Epyc 7313
AMD Epyc 7313p Firmware<milanpi_1.0.0.4
AMD Epyc 7313p
AMD Epyc 7343 Firmware<milanpi_1.0.0.4
AMD Epyc 7343
AMD Epyc 7373x Firmware<milanpi_1.0.0.4
AMD Epyc 7373x
AMD Epyc 73f3 Firmware<milanpi_1.0.0.4
AMD Epyc 73f3
AMD Epyc 7413 Firmware<milanpi_1.0.0.4
AMD Epyc 7413
AMD Epyc 7443 Firmware<milanpi_1.0.0.4
AMD Epyc 7443
AMD Epyc 7443p Firmware<milanpi_1.0.0.4
AMD Epyc 7443p
AMD Epyc 7453 Firmware<milanpi_1.0.0.4
AMD Epyc 7453
AMD Epyc 74f3 Firmware<milanpi_1.0.0.4
AMD Epyc 74f3
AMD Epyc 7513 Firmware<milanpi_1.0.0.4
AMD Epyc 7513
AMD Epyc 7543 Firmware<milanpi_1.0.0.4
AMD Epyc 7543
AMD Epyc 7543p Firmware<milanpi_1.0.0.4
AMD Epyc 7543p
AMD Epyc 7573x Firmware<milanpi_1.0.0.4
AMD Epyc 7573x
AMD Epyc 75f3 Firmware<milanpi_1.0.0.4
AMD Epyc 75f3
AMD Epyc 7643 Firmware<milanpi_1.0.0.4
AMD Epyc 7643
AMD Epyc 7663 Firmware<milanpi_1.0.0.4
AMD Epyc 7663
AMD Epyc 7713 Firmware<milanpi_1.0.0.4
AMD Epyc 7713
AMD Epyc 7713p Firmware<milanpi_1.0.0.4
AMD Epyc 7713p
AMD Epyc 7743 Firmware<milanpi_1.0.0.4
AMD Epyc 7743
AMD Epyc 7763 Firmware<milanpi_1.0.0.4
AMD Epyc 7763
AMD Epyc 7773x Firmware<milanpi_1.0.0.4
AMD Epyc 7773x
All of the following
AMD Epyc 7h12 Firmware<romepi_1.0.0.c
AMD Epyc 7h12
All of the following
AMD Epyc 7f72 Firmware<romepi_1.0.0.c
AMD Epyc 7f72
All of the following
AMD Epyc 7f52 Firmware<romepi_1.0.0.c
AMD Epyc 7f52
All of the following
AMD Epyc 7f32 Firmware<romepi_1.0.0.c
AMD Epyc 7f32
All of the following
AMD Epyc 7742 Firmware<romepi_1.0.0.c
AMD Epyc 7742
All of the following
AMD Epyc 7702p Firmware<romepi_1.0.0.c
AMD Epyc 7702p
All of the following
AMD Epyc 7702 Firmware<romepi_1.0.0.c
AMD Epyc 7702
All of the following
AMD Epyc 7662 Firmware<romepi_1.0.0.c
AMD Epyc 7662
All of the following
AMD Epyc 7642 Firmware<romepi_1.0.0.c
AMD Epyc 7642
All of the following
AMD Epyc 7552 Firmware<romepi_1.0.0.c
AMD Epyc 7552
All of the following
AMD Epyc 7542 Firmware<romepi_1.0.0.c
AMD Epyc 7542
All of the following
AMD Epyc 7532 Firmware<romepi_1.0.0.c
AMD Epyc 7532
All of the following
AMD Epyc 7502p Firmware<romepi_1.0.0.c
AMD Epyc 7502p
All of the following
AMD Epyc 7502 Firmware<romepi_1.0.0.c
AMD Epyc 7502
All of the following
AMD Epyc 7452 Firmware<romepi_1.0.0.c
AMD Epyc 7452
All of the following
AMD Epyc 7402 Firmware<romepi_1.0.0.c
AMD Epyc 7402
All of the following
AMD Epyc 7402p Firmware<romepi_1.0.0.c
AMD Epyc 7402p
All of the following
AMD Epyc 7352 Firmware<romepi_1.0.0.c
AMD Epyc 7352
All of the following
AMD Epyc 7302p Firmware<romepi_1.0.0.c
AMD Epyc 7302p
All of the following
AMD Epyc 7302 Firmware<romepi_1.0.0.c
AMD Epyc 7302
All of the following
AMD Epyc 7282 Firmware<romepi_1.0.0.c
AMD Epyc 7282
All of the following
AMD Epyc 7272 Firmware<romepi_1.0.0.c
AMD Epyc 7272
All of the following
AMD Epyc 7262 Firmware<romepi_1.0.0.c
AMD Epyc 7262
All of the following
AMD Epyc 7252 Firmware<romepi_1.0.0.c
AMD Epyc 7252
All of the following
AMD Epyc 7232p Firmware<romepi_1.0.0.c
AMD Epyc 7232p
All of the following
AMD Epyc 7002 Firmware<romepi_1.0.0.c
AMD Epyc 7002
All of the following
AMD Epyc 7003 Firmware<milanpi_1.0.0.4
AMD Epyc 7003
All of the following
AMD Epyc 72f3 Firmware<milanpi_1.0.0.4
AMD Epyc 72f3
All of the following
AMD Epyc 7313 Firmware<milanpi_1.0.0.4
AMD Epyc 7313
All of the following
AMD Epyc 7313p Firmware<milanpi_1.0.0.4
AMD Epyc 7313p
All of the following
AMD Epyc 7343 Firmware<milanpi_1.0.0.4
AMD Epyc 7343
All of the following
AMD Epyc 7373x Firmware<milanpi_1.0.0.4
AMD Epyc 7373x
All of the following
AMD Epyc 73f3 Firmware<milanpi_1.0.0.4
AMD Epyc 73f3
All of the following
AMD Epyc 7413 Firmware<milanpi_1.0.0.4
AMD Epyc 7413
All of the following
AMD Epyc 7443 Firmware<milanpi_1.0.0.4
AMD Epyc 7443
All of the following
AMD Epyc 7443p Firmware<milanpi_1.0.0.4
AMD Epyc 7443p
All of the following
AMD Epyc 7453 Firmware<milanpi_1.0.0.4
AMD Epyc 7453
All of the following
AMD Epyc 74f3 Firmware<milanpi_1.0.0.4
AMD Epyc 74f3
All of the following
AMD Epyc 7513 Firmware<milanpi_1.0.0.4
AMD Epyc 7513
All of the following
AMD Epyc 7543 Firmware<milanpi_1.0.0.4
AMD Epyc 7543
All of the following
AMD Epyc 7543p Firmware<milanpi_1.0.0.4
AMD Epyc 7543p
All of the following
AMD Epyc 7573x Firmware<milanpi_1.0.0.4
AMD Epyc 7573x
All of the following
AMD Epyc 75f3 Firmware<milanpi_1.0.0.4
AMD Epyc 75f3
All of the following
AMD Epyc 7643 Firmware<milanpi_1.0.0.4
AMD Epyc 7643
All of the following
AMD Epyc 7663 Firmware<milanpi_1.0.0.4
AMD Epyc 7663
All of the following
AMD Epyc 7713 Firmware<milanpi_1.0.0.4
AMD Epyc 7713
All of the following
AMD Epyc 7713p Firmware<milanpi_1.0.0.4
AMD Epyc 7713p
All of the following
AMD Epyc 7743 Firmware<milanpi_1.0.0.4
AMD Epyc 7743
All of the following
AMD Epyc 7763 Firmware<milanpi_1.0.0.4
AMD Epyc 7763
All of the following
AMD Epyc 7773x Firmware<milanpi_1.0.0.4
AMD Epyc 7773x

Event History

Jan 10, 2023
CVE Published
via MITRE·08:56 PM
Data Sourced
via MITRE·08:56 PM
Description
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Frequently Asked Questions

1

What is the severity of CVE-2021-26402?

CVE-2021-26402 has a severity rating that indicates a potential loss of integrity and availability due to insufficient bounds checking in AMD Secure Processor firmware.

2

How do I fix CVE-2021-26402?

To fix CVE-2021-26402, updating the affected AMD Epyc firmware to a version that contains security patches is necessary.

3

Which systems are affected by CVE-2021-26402?

CVE-2021-26402 affects various AMD Epyc firmware versions up to romepi_1.0.0.c.

4

What potential impact does CVE-2021-26402 have?

The potential impact of CVE-2021-26402 includes the ability for an attacker to write partially-controlled data out-of-bounds, potentially compromising system integrity.

5

Is CVE-2021-26402 remotely exploitable?

CVE-2021-26402 can potentially be exploited locally, depending on the attack vector used.

Company

Resources

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