Advisory Published
Updated

CVE-2021-26355

First published: Wed Jan 11 2023(Updated: )

Insufficient fencing and checks in System Management Unit (SMU) may result in access to invalid message port registers that could result in a potential denial-of-service.

Credit: psirt@amd.com

Affected SoftwareAffected VersionHow to fix
Amd Epyc 7003 Firmware<milanpi-sp3_1.0.0.7
Amd Epyc 7003
Amd Epyc 72f3 Firmware<milanpi-sp3_1.0.0.7
Amd Epyc 72f3
Amd Epyc 7313 Firmware<milanpi-sp3_1.0.0.7
Amd Epyc 7313
Amd Epyc 7313p Firmware<milanpi-sp3_1.0.0.7
Amd Epyc 7313p
Amd Epyc 7343 Firmware<milanpi-sp3_1.0.0.7
Amd Epyc 7343
Amd Epyc 7373x Firmware<milanpi-sp3_1.0.0.7
Amd Epyc 7373x
Amd Epyc 73f3 Firmware<milanpi-sp3_1.0.0.7
Amd Epyc 73f3
Amd Epyc 7413 Firmware<milanpi-sp3_1.0.0.7
Amd Epyc 7413
Amd Epyc 7443 Firmware<milanpi-sp3_1.0.0.7
Amd Epyc 7443
Amd Epyc 7443p Firmware<milanpi-sp3_1.0.0.7
Amd Epyc 7443p
Amd Epyc 7453 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 7513 Firmware<milanpi-sp3_1.0.0.7
Amd Epyc 7513
Amd Epyc 7543 Firmware<milanpi-sp3_1.0.0.7
Amd Epyc 7543
Amd Epyc 7543p Firmware<milanpi-sp3_1.0.0.7
Amd Epyc 7543p
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 7643 Firmware<milanpi-sp3_1.0.0.7
Amd Epyc 7643
Amd Epyc 7663 Firmware<milanpi-sp3_1.0.0.7
Amd Epyc 7663
Amd Epyc 7713 Firmware<milanpi-sp3_1.0.0.7
Amd Epyc 7713
Amd Epyc 7713p Firmware<milanpi-sp3_1.0.0.7
Amd Epyc 7713p
Amd Epyc 7743 Firmware<milanpi-sp3_1.0.0.7
Amd Epyc 7743
Amd Epyc 7763 Firmware<milanpi-sp3_1.0.0.7
Amd Epyc 7763
Amd Epyc 7773x Firmware<milanpi-sp3_1.0.0.7
Amd Epyc 7773x

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Frequently Asked Questions

  • What is the vulnerability ID for this issue?

    The vulnerability ID for this issue is CVE-2021-26355.

  • What is the description of CVE-2021-26355?

    CVE-2021-26355 is a vulnerability that involves insufficient fencing and checks in the System Management Unit (SMU), which may result in access to invalid message port registers and potential denial-of-service.

  • Which software versions are affected by CVE-2021-26355?

    The affected software versions for CVE-2021-26355 are Amd Epyc 7003 Firmware up to but excluding milanpi-sp3_1.0.0.7 and Amd Epyc 72f3 Firmware up to but excluding milanpi-sp3_1.0.0.7.

  • What is the severity of CVE-2021-26355?

    CVE-2021-26355 has a severity value of 5.5, which is classified as medium.

  • How can I fix CVE-2021-26355?

    To fix CVE-2021-26355, it is recommended to apply the necessary updates or patches provided by AMD to the affected software versions.

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