medium
4.7
CWE
367 362
Advisory Published
Updated

CVE-2021-26350: Race Condition

First published: Tue May 10 2022(Updated: )

A TOCTOU race condition in SMU may allow for the caller to obtain and manipulate the address of a message port register which may result in a potential denial of service.

Credit: psirt@amd.com

Affected SoftwareAffected VersionHow to fix
AMD EPYC 7232p firmware<romepi-sp3_1.0.0.d
AMD EPYC 7232p firmware
AMD EPYC 7302P Firmware<romepi-sp3_1.0.0.d
AMD EPYC 7302P
AMD EPYC 7402P Firmware<romepi-sp3_1.0.0.d
AMD EPYC 7402P
AMD EPYC 7502P Firmware<romepi-sp3_1.0.0.d
AMD EPYC 7502P
AMD EPYC 7702 Firmware<romepi-sp3_1.0.0.d
AMD EPYC 7702p
AMD EPYC 7252 Firmware<romepi-sp3_1.0.0.d
AMD EPYC 7252 Firmware
AMD EPYC 7262 Firmware<romepi-sp3_1.0.0.d
AMD EPYC 7262 Firmware
AMD EPYC 7272 firmware<romepi-sp3_1.0.0.d
AMD EPYC 7272 firmware
AMD EPYC 7282 Firmware<romepi-sp3_1.0.0.d
AMD EPYC 7282
Amd Epyc Server Firmware<romepi-sp3_1.0.0.d
AMD EPYC 7302P
AMD EPYC 7352 firmware<romepi-sp3_1.0.0.d
AMD EPYC 7352
Amd Epyc Server Firmware<romepi-sp3_1.0.0.d
AMD EPYC 7402
AMD EPYC 7452 Firmware<romepi-sp3_1.0.0.d
AMD EPYC 7452
Amd Epyc Server Firmware<romepi-sp3_1.0.0.d
AMD EPYC 7502
AMD EPYC 7532 Firmware<romepi-sp3_1.0.0.d
AMD EPYC 7532
AMD EPYC 7542 Firmware<romepi-sp3_1.0.0.d
AMD EPYC 7542
AMD EPYC 7552 Firmware<romepi-sp3_1.0.0.d
AMD EPYC Embedded 7552
AMD EPYC 7642 Firmware<romepi-sp3_1.0.0.d
AMD EPYC 7642 Firmware
AMD EPYC 7662 Firmware<romepi-sp3_1.0.0.d
AMD EPYC 7662
AMD EPYC 7702 Firmware<romepi-sp3_1.0.0.d
AMD EPYC 7702
AMD EPYC 7742 firmware<romepi-sp3_1.0.0.d
AMD EPYC 7742 firmware
AMD EPYC 7F32 Firmware<romepi-sp3_1.0.0.d
AMD EPYC 7F32 Firmware
AMD EPYC 7F52 Firmware<romepi-sp3_1.0.0.d
AMD EPYC 7F52
AMD EPYC 7F72 Firmware<romepi-sp3_1.0.0.d
AMD EPYC 7F72
AMD EPYC 7313P Firmware<milanpi-sp3_1.0.0.7
AMD EPYC 7313P
AMD EPYC 7443P Firmware<milanpi-sp3_1.0.0.7
AMD EPYC 7443P
AMD EPYC 7543P Firmware<milanpi-sp3_1.0.0.7
AMD EPYC 7543P Firmware
AMD EPYC 7713P Firmware<milanpi-sp3_1.0.0.7
AMD EPYC 7713P Firmware
AMD EPYC 7773X Firmware<milanpi-sp3_1.0.0.7
AMD EPYC 7773X
AMD EPYC 7763 Firmware<milanpi-sp3_1.0.0.7
AMD EPYC 7763 Firmware
AMD EPYC 7713P Firmware<milanpi-sp3_1.0.0.7
AMD EPYC 7713
AMD EPYC 7663 Firmware<milanpi-sp3_1.0.0.7
AMD EPYC 7663 Firmware
AMD EPYC 7643 Firmware<milanpi-sp3_1.0.0.7
AMD EPYC 7643
AMD EPYC 7573X Firmware<milanpi-sp3_1.0.0.7
AMD EPYC 7573X
AMD EPYC 75F3 Firmware<milanpi-sp3_1.0.0.7
AMD EPYC 75F3
AMD EPYC 7513 Firmware<milanpi-sp3_1.0.0.7
AMD EPYC 7513
AMD EPYC 7473X Firmware<milanpi-sp3_1.0.0.7
AMD EPYC 7473X
Amd Epyc Server Firmware<milanpi-sp3_1.0.0.7
AMD EPYC 7453
AMD EPYC 74F3 Firmware<milanpi-sp3_1.0.0.7
AMD EPYC 74F3
AMD EPYC 7413 Firmware<milanpi-sp3_1.0.0.7
AMD EPYC 7413 Firmware
AMD EPYC 73F3 Firmware<milanpi-sp3_1.0.0.7
AMD EPYC 73F3
AMD EPYC 7373X Firmware<milanpi-sp3_1.0.0.7
AMD EPYC 7373X
Amd Epyc Server Firmware<milanpi-sp3_1.0.0.7
AMD EPYC 7343
AMD EPYC 72F3 Firmware<milanpi-sp3_1.0.0.7
AMD EPYC 72F3 Firmware

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Reference Links

Frequently Asked Questions

  • What is the severity of CVE-2021-26350?

    CVE-2021-26350 is classified as a high severity vulnerability due to its potential for denial of service.

  • How do I fix CVE-2021-26350?

    To fix CVE-2021-26350, update the Amd Epyc firmware to version higher than romepi-sp3_1.0.0.d or milanpi-sp3_1.0.0.7 as appropriate.

  • What causes the vulnerability CVE-2021-26350?

    CVE-2021-26350 is caused by a time-of-check to time-of-use (TOCTOU) race condition in the SMU.

  • Which Amd Epyc firmware versions are affected by CVE-2021-26350?

    Amd Epyc firmware versions up to romepi-sp3_1.0.0.d and milanpi-sp3_1.0.0.7 are affected by CVE-2021-26350.

  • What systems are impacted by CVE-2021-26350?

    CVE-2021-26350 impacts various Amd Epyc processors and their corresponding firmware releases.

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