high
7.4
CWE
367
Advisory Published
Updated

CVE-2021-26356

First published: Tue May 09 2023(Updated: )

A TOCTOU in ASP bootloader may allow an attacker to tamper with the SPI ROM following data read to memory potentially resulting in S3 data corruption and information disclosure.

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

Affected SoftwareAffected VersionHow to fix
All of
Amd Epyc Server Firmware<naplespi_1.0.0.h
AMD EPYC 7001 Firmware
All of
AMD EPYC 7251 Firmware<naplespi_1.0.0.h
AMD EPYC 7251 Firmware
All of
AMD EPYC 7261 Firmware<naplespi_1.0.0.h
AMD EPYC 7261
All of
Amd Epyc Server Firmware<naplespi_1.0.0.h
AMD EPYC Server
All of
Amd Epyc Server Firmware<naplespi_1.0.0.h
AMD EPYC 7301 Firmware
All of
AMD EPYC 7351P Firmware<naplespi_1.0.0.h
AMD EPYC 7351 Firmware
All of
AMD EPYC 7351P Firmware<naplespi_1.0.0.h
AMD EPYC 7351P Firmware
All of
AMD EPYC 7371 Firmware<naplespi_1.0.0.h
AMD EPYC 7371 Firmware
All of
AMD EPYC 7401P Firmware<naplespi_1.0.0.h
AMD EPYC 7401 Firmware
All of
AMD EPYC 7401P Firmware<naplespi_1.0.0.h
AMD EPYC 7401P Firmware
All of
AMD EPYC 7451 Firmware<naplespi_1.0.0.h
AMD EPYC 7451 Firmware
All of
AMD EPYC 7501 Firmware<naplespi_1.0.0.h
AMD EPYC Server
All of
AMD EPYC 7551P Firmware<naplespi_1.0.0.h
AMD EPYC 7551 Firmware
All of
AMD EPYC 7551P Firmware<naplespi_1.0.0.h
AMD EPYC 7551P Firmware
All of
AMD EPYC 7601 Firmware<naplespi_1.0.0.h
AMD EPYC 7601 Firmware
All of
AMD EPYC 7002 Firmware<romepi_1.0.0.d
AMD EPYC Server
All of
AMD EPYC 7232p firmware<romepi_1.0.0.d
AMD EPYC 7232p firmware
All of
AMD EPYC 7252 Firmware<romepi_1.0.0.d
AMD EPYC 7252 Firmware
All of
AMD EPYC 7262 Firmware<romepi_1.0.0.d
AMD EPYC 7262 Firmware
All of
AMD EPYC 7272 firmware<romepi_1.0.0.d
AMD EPYC 7272 firmware
All of
AMD EPYC 7282 Firmware<romepi_1.0.0.d
AMD EPYC 7282 Firmware
All of
Amd Epyc Server Firmware<romepi_1.0.0.d
AMD EPYC 7302 Firmware
All of
AMD EPYC 7302P Firmware<romepi_1.0.0.d
AMD EPYC 7302P Firmware
All of
AMD EPYC Firmware<romepi_1.0.0.d
AMD EPYC 7352 firmware
All of
Amd Epyc Server Firmware<romepi_1.0.0.d
AMD EPYC 7402 Firmware
All of
AMD EPYC 7402P Firmware<romepi_1.0.0.d
AMD EPYC 7402P Firmware
All of
AMD EPYC 7452 Firmware<romepi_1.0.0.d
AMD EPYC Server
All of
AMD EPYC 7502 Firmware<romepi_1.0.0.d
AMD EPYC 7502 firmware
All of
AMD EPYC 7532 Firmware<romepi_1.0.0.d
AMD EPYC 7532 Firmware
All of
AMD EPYC 7542 Firmware<romepi_1.0.0.d
AMD EPYC Server
All of
AMD EPYC 7552 Firmware<romepi_1.0.0.d
AMD EPYC 7552 Firmware
All of
AMD EPYC 7642 Firmware<romepi_1.0.0.d
AMD EPYC 7642 Firmware
All of
AMD EPYC 7662 Firmware<romepi_1.0.0.d
AMD EPYC 7662 Firmware
All of
AMD EPYC 7702p firmware<romepi_1.0.0.d
AMD EPYC Server
All of
AMD EPYC 7702 Firmware<romepi_1.0.0.d
AMD EPYC 7702P
All of
AMD EPYC 7F32 Firmware<romepi_1.0.0.d
AMD EPYC 7F32 Firmware
All of
AMD EPYC 7F52 Firmware<romepi_1.0.0.d
AMD EPYC 7F52 Firmware
All of
AMD EPYC 7F72<romepi_1.0.0.d
AMD EPYC 7F72 Firmware
All of
AMD EPYC 7H12 Firmware<romepi_1.0.0.d
AMD EPYC 7H12 Firmware
All of
AMD EPYC 7742 Firmware<romepi_1.0.0.d
AMD EPYC Server
All of
AMD EPYC 7773X Firmware<milanpi_1.0.0.6
AMD EPYC 7773X Firmware
All of
AMD EPYC 7763 Firmware<milanpi_1.0.0.6
AMD EPYC 7763 Firmware
All of
AMD EPYC 7713P Firmware<milanpi_1.0.0.6
AMD EPYC 7713P Firmware
All of
AMD EPYC 7713P Firmware<milanpi_1.0.0.6
AMD EPYC 7713 Firmware
All of
AMD EPYC 7663 Firmware<milanpi_1.0.0.6
AMD EPYC 7663 Firmware
All of
AMD EPYC 7643P Firmware<milanpi_1.0.0.6
AMD EPYC 7643 Firmware
All of
AMD EPYC 75F3 Firmware<milanpi_1.0.0.6
AMD EPYC 75F3 Firmware
All of
AMD EPYC 7573X Firmware<milanpi_1.0.0.6
AMD EPYC 7573X Firmware
All of
AMD EPYC 7543P Firmware<milanpi_1.0.0.6
AMD EPYC 7543P Firmware
All of
Amd Epyc Server Firmware<milanpi_1.0.0.6
AMD EPYC 7543 Firmware
All of
AMD EPYC 7513 Firmware<milanpi_1.0.0.6
AMD EPYC 7513 Firmware
All of
AMD EPYC 74F3 Firmware<milanpi_1.0.0.6
AMD EPYC 74F3 Firmware
All of
AMD EPYC 7473X Firmware<milanpi_1.0.0.6
AMD EPYC 7473X Firmware
All of
AMD EPYC 7443P Firmware<milanpi_1.0.0.6
AMD EPYC 7443P Firmware
All of
AMD EPYC 7443P Firmware<milanpi_1.0.0.6
AMD EPYC 7443P
All of
Amd Epyc Server Firmware<milanpi_1.0.0.6
AMD EPYC Server
All of
AMD EPYC 7413 Firmware<milanpi_1.0.0.6
AMD EPYC 7413 Firmware
All of
AMD EPYC 7373X Firmware<milanpi_1.0.0.6
AMD EPYC 7373X Firmware
All of
AMD EPYC Firmware<milanpi_1.0.0.6
AMD EPYC 7313 Firmware
All of
AMD EPYC 7313P Firmware<milanpi_1.0.0.6
AMD EPYC 7313P Firmware
All of
Amd Epyc Server Firmware<milanpi_1.0.0.6
AMD EPYC 7343 Firmware
All of
AMD EPYC 72F3 Firmware<milanpi_1.0.0.6
AMD EPYC 72F3 Firmware
All of
AMD Ryzen 9 3950XT firmware
AMD Ryzen 9 3950XT
All of
AMD Ryzen 9 3950XT Firmware
AMD Ryzen 9 3950XT firmware
All of
AMD Ryzen 9 3900XT Firmware
AMD Ryzen 9 Pro 3900
All of
AMD Ryzen 9 3900X
AMD Ryzen 9 3900X
All of
AMD Ryzen 7 3800XT Firmware
AMD Ryzen 7 3800X Firmware
All of
AMD Ryzen 7 3800XT Firmware
AMD Ryzen 7 3800XT Firmware
All of
AMD Ryzen 7 3700XT Firmware
AMD Ryzen 7 3700XT Firmware
All of
AMD Ryzen 5 3600X Firmware
AMD Ryzen 5 3600X Firmware
All of
AMD Ryzen 5 3600XT
AMD Ryzen 5 3600XT firmware
All of
AMD Ryzen 5 3600 firmware
AMD Ryzen 5 3600 firmware
All of
AMD Ryzen 5 3500X Firmware
AMD Ryzen 5 3500X Firmware
All of
AMD Ryzen 5 3500X Firmware
AMD Ryzen 5 3500
All of
AMD Ryzen 3 3300X Firmware
AMD Ryzen 3 3300X Firmware
All of
AMD Ryzen 3100 Firmware
AMD Ryzen 3 3100 Firmware
All of
AMD Ryzen 9 5950X<comboam4_v2_pi_1.2.0.6
AMD Ryzen 9 5950X
All of
AMD Ryzen 9 5900X Firmware<comboam4_v2_pi_1.2.0.6
AMD Ryzen 9 5900X
All of
AMD Ryzen 9 5900 Firmware<comboam4_v2_pi_1.2.0.6
AMD Ryzen 5900 CPU
All of
AMD Ryzen 7 5800X3D Firmware<comboam4_v2_pi_1.2.0.6
AMD Ryzen 7 5800X3D Firmware
All of
AMD Ryzen 7 5800X Firmware<comboam4_v2_pi_1.2.0.6
AMD Ryzen 7 5800X
All of
AMD Ryzen 7 5800 Firmware<comboam4_v2_pi_1.2.0.6
AMD Ryzen 7 5800
All of
AMD Ryzen 5700X Firmware<comboam4_v2_pi_1.2.0.6
AMD Ryzen 5700X Firmware
All of
AMD Ryzen 5 5600 Firmware<comboam4_v2_pi_1.2.0.6
AMD Ryzen 5 5600
All of
AMD Ryzen 5 5600X<comboam4_v2_pi_1.2.0.6
AMD Ryzen 5 5600X Firmware
All of
AMD Ryzen 5 5500 firmware<comboam4_v2_pi_1.2.0.6
AMD Ryzen 5 5500 firmware
All of
AMD Ryzen Threadripper 3990X
AMD Ryzen Threadripper 3990X
All of
AMD Ryzen Threadripper 3970X
AMD Ryzen Threadripper 3970X Firmware
All of
AMD Ryzen Threadripper 3960X Firmware
AMD Ryzen Threadripper 3960X Firmware
All of
AMD Ryzen Threadripper Pro 3995WX Firmware
AMD Ryzen Threadripper Pro
All of
AMD Ryzen Threadripper Pro 3975WX Firmware
AMD Ryzen Threadripper Pro 3975WX Firmware
All of
AMD Ryzen Threadripper Pro 3955WX Firmware
AMD Ryzen Threadripper Pro 3955WX Firmware
All of
AMD Ryzen Threadripper Pro
AMD Ryzen Threadripper Pro 3945WX Firmware
All of
AMD Ryzen Threadripper Pro 5955WX Firmware
AMD Ryzen Threadripper Pro 5955WX Firmware
All of
AMD Ryzen Threadripper Pro 5965WX Firmware
AMD Ryzen Threadripper Pro
All of
AMD Ryzen Threadripper Pro 5945WX Firmware
AMD Ryzen Threadripper Pro 5945WX Firmware
All of
AMD Ryzen Threadripper Pro 5975W Firmware
AMD Ryzen Threadripper Pro 5975W Firmware
All of
AMD Ryzen Threadripper Pro 5995WX Firmware
AMD Ryzen Threadripper Pro 5995WX Firmware
Amd Epyc Server Firmware<naplespi_1.0.0.h
AMD EPYC 7001 Firmware
AMD EPYC 7251 Firmware<naplespi_1.0.0.h
AMD EPYC 7251 Firmware
AMD EPYC 7261 Firmware<naplespi_1.0.0.h
AMD EPYC 7261
Amd Epyc Server Firmware<naplespi_1.0.0.h
AMD EPYC Server
Amd Epyc Server Firmware<naplespi_1.0.0.h
AMD EPYC 7301 Firmware
AMD EPYC 7351P Firmware<naplespi_1.0.0.h
AMD EPYC 7351 Firmware
AMD EPYC 7351P Firmware<naplespi_1.0.0.h
AMD EPYC 7351P Firmware
AMD EPYC 7371 Firmware<naplespi_1.0.0.h
AMD EPYC 7371 Firmware
AMD EPYC 7401P Firmware<naplespi_1.0.0.h
AMD EPYC 7401 Firmware
AMD EPYC 7401P Firmware<naplespi_1.0.0.h
AMD EPYC 7401P Firmware
AMD EPYC 7451 Firmware<naplespi_1.0.0.h
AMD EPYC 7451 Firmware
AMD EPYC 7501 Firmware<naplespi_1.0.0.h
AMD EPYC Server
AMD EPYC 7551P Firmware<naplespi_1.0.0.h
AMD EPYC 7551 Firmware
AMD EPYC 7551P Firmware<naplespi_1.0.0.h
AMD EPYC 7551P Firmware
AMD EPYC 7601 Firmware<naplespi_1.0.0.h
AMD EPYC 7601 Firmware
AMD EPYC 7002 Firmware<romepi_1.0.0.d
AMD EPYC Server
AMD EPYC 7232p firmware<romepi_1.0.0.d
AMD EPYC 7232p firmware
AMD EPYC 7252 Firmware<romepi_1.0.0.d
AMD EPYC 7252 Firmware
AMD EPYC 7262 Firmware<romepi_1.0.0.d
AMD EPYC 7262 Firmware
AMD EPYC 7272 firmware<romepi_1.0.0.d
AMD EPYC 7272 firmware
AMD EPYC 7282 Firmware<romepi_1.0.0.d
AMD EPYC 7282 Firmware
Amd Epyc Server Firmware<romepi_1.0.0.d
AMD EPYC 7302 Firmware
AMD EPYC 7302P Firmware<romepi_1.0.0.d
AMD EPYC 7302P Firmware
AMD EPYC Firmware<romepi_1.0.0.d
AMD EPYC 7352 firmware
Amd Epyc Server Firmware<romepi_1.0.0.d
AMD EPYC 7402 Firmware
AMD EPYC 7402P Firmware<romepi_1.0.0.d
AMD EPYC 7402P Firmware
AMD EPYC 7452 Firmware<romepi_1.0.0.d
AMD EPYC Server
AMD EPYC 7502 Firmware<romepi_1.0.0.d
AMD EPYC 7502 firmware
AMD EPYC 7532 Firmware<romepi_1.0.0.d
AMD EPYC 7532 Firmware
AMD EPYC 7542 Firmware<romepi_1.0.0.d
AMD EPYC Server
AMD EPYC 7552 Firmware<romepi_1.0.0.d
AMD EPYC 7552 Firmware
AMD EPYC 7642 Firmware<romepi_1.0.0.d
AMD EPYC 7642 Firmware
AMD EPYC 7662 Firmware<romepi_1.0.0.d
AMD EPYC 7662 Firmware
AMD EPYC 7702p firmware<romepi_1.0.0.d
AMD EPYC Server
AMD EPYC 7702 Firmware<romepi_1.0.0.d
AMD EPYC 7702P
AMD EPYC 7F32 Firmware<romepi_1.0.0.d
AMD EPYC 7F32 Firmware
AMD EPYC 7F52 Firmware<romepi_1.0.0.d
AMD EPYC 7F52 Firmware
AMD EPYC 7F72<romepi_1.0.0.d
AMD EPYC 7F72 Firmware
AMD EPYC 7H12 Firmware<romepi_1.0.0.d
AMD EPYC 7H12 Firmware
AMD EPYC 7742 Firmware<romepi_1.0.0.d
AMD EPYC Server
AMD EPYC 7773X Firmware<milanpi_1.0.0.6
AMD EPYC 7773X Firmware
AMD EPYC 7763 Firmware<milanpi_1.0.0.6
AMD EPYC 7763 Firmware
AMD EPYC 7713P Firmware<milanpi_1.0.0.6
AMD EPYC 7713P Firmware
AMD EPYC 7713P Firmware<milanpi_1.0.0.6
AMD EPYC 7713 Firmware
AMD EPYC 7663 Firmware<milanpi_1.0.0.6
AMD EPYC 7663 Firmware
AMD EPYC 7643P Firmware<milanpi_1.0.0.6
AMD EPYC 7643 Firmware
AMD EPYC 75F3 Firmware<milanpi_1.0.0.6
AMD EPYC 75F3 Firmware
AMD EPYC 7573X Firmware<milanpi_1.0.0.6
AMD EPYC 7573X Firmware
AMD EPYC 7543P Firmware<milanpi_1.0.0.6
AMD EPYC 7543P Firmware
Amd Epyc Server Firmware<milanpi_1.0.0.6
AMD EPYC 7543 Firmware
AMD EPYC 7513 Firmware<milanpi_1.0.0.6
AMD EPYC 7513 Firmware
AMD EPYC 74F3 Firmware<milanpi_1.0.0.6
AMD EPYC 74F3 Firmware
AMD EPYC 7473X Firmware<milanpi_1.0.0.6
AMD EPYC 7473X Firmware
AMD EPYC 7443P Firmware<milanpi_1.0.0.6
AMD EPYC 7443P Firmware
AMD EPYC 7443P Firmware<milanpi_1.0.0.6
AMD EPYC 7443P
Amd Epyc Server Firmware<milanpi_1.0.0.6
AMD EPYC Server
AMD EPYC 7413 Firmware<milanpi_1.0.0.6
AMD EPYC 7413 Firmware
AMD EPYC 7373X Firmware<milanpi_1.0.0.6
AMD EPYC 7373X Firmware
AMD EPYC Firmware<milanpi_1.0.0.6
AMD EPYC 7313 Firmware
AMD EPYC 7313P Firmware<milanpi_1.0.0.6
AMD EPYC 7313P Firmware
Amd Epyc Server Firmware<milanpi_1.0.0.6
AMD EPYC 7343 Firmware
AMD EPYC 72F3 Firmware<milanpi_1.0.0.6
AMD EPYC 72F3 Firmware
AMD Ryzen 9 3950XT firmware
AMD Ryzen 9 3950XT
AMD Ryzen 9 3950XT Firmware
AMD Ryzen 9 3950XT firmware
AMD Ryzen 9 3900XT Firmware
AMD Ryzen 9 Pro 3900
AMD Ryzen 9 3900X
AMD Ryzen 9 3900X
AMD Ryzen 7 3800XT Firmware
AMD Ryzen 7 3800X Firmware
AMD Ryzen 7 3800XT Firmware
AMD Ryzen 7 3800XT Firmware
AMD Ryzen 7 3700XT Firmware
AMD Ryzen 7 3700XT Firmware
AMD Ryzen 5 3600X Firmware
AMD Ryzen 5 3600X Firmware
AMD Ryzen 5 3600XT
AMD Ryzen 5 3600XT firmware
AMD Ryzen 5 3600 firmware
AMD Ryzen 5 3600 firmware
AMD Ryzen 5 3500X Firmware
AMD Ryzen 5 3500X Firmware
AMD Ryzen 5 3500X Firmware
AMD Ryzen 5 3500
AMD Ryzen 3 3300X Firmware
AMD Ryzen 3 3300X Firmware
AMD Ryzen 3100 Firmware
AMD Ryzen 3 3100 Firmware
AMD Ryzen 9 5950X<comboam4_v2_pi_1.2.0.6
AMD Ryzen 9 5950X
AMD Ryzen 9 5900X Firmware<comboam4_v2_pi_1.2.0.6
AMD Ryzen 9 5900X
AMD Ryzen 9 5900 Firmware<comboam4_v2_pi_1.2.0.6
AMD Ryzen 5900 CPU
AMD Ryzen 7 5800X3D Firmware<comboam4_v2_pi_1.2.0.6
AMD Ryzen 7 5800X3D Firmware
AMD Ryzen 7 5800X Firmware<comboam4_v2_pi_1.2.0.6
AMD Ryzen 7 5800X
AMD Ryzen 7 5800 Firmware<comboam4_v2_pi_1.2.0.6
AMD Ryzen 7 5800
AMD Ryzen 5700X Firmware<comboam4_v2_pi_1.2.0.6
AMD Ryzen 5700X Firmware
AMD Ryzen 5 5600 Firmware<comboam4_v2_pi_1.2.0.6
AMD Ryzen 5 5600
AMD Ryzen 5 5600X<comboam4_v2_pi_1.2.0.6
AMD Ryzen 5 5600X Firmware
AMD Ryzen 5 5500 firmware<comboam4_v2_pi_1.2.0.6
AMD Ryzen 5 5500 firmware
AMD Ryzen Threadripper 3990X
AMD Ryzen Threadripper 3990X
AMD Ryzen Threadripper 3970X
AMD Ryzen Threadripper 3970X Firmware
AMD Ryzen Threadripper 3960X Firmware
AMD Ryzen Threadripper 3960X Firmware
AMD Ryzen Threadripper Pro 3995WX Firmware
AMD Ryzen Threadripper Pro
AMD Ryzen Threadripper Pro 3975WX Firmware
AMD Ryzen Threadripper Pro 3975WX Firmware
AMD Ryzen Threadripper Pro 3955WX Firmware
AMD Ryzen Threadripper Pro 3955WX Firmware
AMD Ryzen Threadripper Pro
AMD Ryzen Threadripper Pro 3945WX Firmware
AMD Ryzen Threadripper Pro 5955WX Firmware
AMD Ryzen Threadripper Pro 5955WX Firmware
AMD Ryzen Threadripper Pro 5965WX Firmware
AMD Ryzen Threadripper Pro
AMD Ryzen Threadripper Pro 5945WX Firmware
AMD Ryzen Threadripper Pro 5945WX Firmware
AMD Ryzen Threadripper Pro 5975W Firmware
AMD Ryzen Threadripper Pro 5975W Firmware
AMD Ryzen Threadripper Pro 5995WX Firmware
AMD Ryzen Threadripper Pro 5995WX Firmware

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Reference Links

Frequently Asked Questions

  • What is the severity of CVE-2021-26356?

    CVE-2021-26356 is considered a high-severity vulnerability due to its potential impact on data corruption and information disclosure.

  • How do I fix CVE-2021-26356?

    To fix CVE-2021-26356, update the affected AMD EPYC firmware to the latest version provided by AMD.

  • Which systems are affected by CVE-2021-26356?

    CVE-2021-26356 affects various AMD EPYC firmware versions, specifically those prior to naplespi_1.0.0.h and romepi_1.0.0.d.

  • What are the potential impacts of exploiting CVE-2021-26356?

    Exploiting CVE-2021-26356 could allow an attacker to tamper with the SPI ROM and result in S3 data corruption and information disclosure.

  • Is there a known workaround for CVE-2021-26356?

    There are currently no known workarounds for CVE-2021-26356; upgrading the firmware is the recommended action.

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