medium
5.5
CWE
119
Advisory Published
Updated

CVE-2021-26364: Buffer Overflow

First published: Tue May 10 2022(Updated: )

Insufficient bounds checking in an SMU mailbox register could allow an attacker to potentially read outside of the SRAM address range which could result in an exception handling leading to 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 Firmware
AMD EPYC 7402P Firmware<romepi-sp3_1.0.0.d
AMD EPYC 7402P Firmware
AMD EPYC 7502P Firmware<romepi-sp3_1.0.0.d
AMD EPYC 7502P Firmware
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 Firmware
Amd Epyc Server Firmware<romepi-sp3_1.0.0.d
AMD EPYC 7302 Firmware
AMD EPYC Firmware<romepi-sp3_1.0.0.d
AMD EPYC 7352 firmware
Amd Epyc Server Firmware<romepi-sp3_1.0.0.d
AMD EPYC 7402 Firmware
AMD EPYC 7452 Firmware<romepi-sp3_1.0.0.d
AMD EPYC Server
AMD EPYC 7502 Firmware<romepi-sp3_1.0.0.d
AMD EPYC 7502 firmware
AMD EPYC 7532 Firmware<romepi-sp3_1.0.0.d
AMD EPYC 7532 Firmware
AMD EPYC 7542 Firmware<romepi-sp3_1.0.0.d
AMD EPYC Server
AMD EPYC 7552 Firmware<romepi-sp3_1.0.0.d
AMD EPYC 7552 Firmware
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 Firmware
AMD EPYC 7702p firmware<romepi-sp3_1.0.0.d
AMD EPYC Server
AMD EPYC 7742 Firmware<romepi-sp3_1.0.0.d
AMD EPYC Server
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 Firmware
AMD EPYC 7F72<romepi-sp3_1.0.0.d
AMD EPYC 7F72 Firmware
AMD EPYC 7313P Firmware<milanpi-sp3_1.0.0.7
AMD EPYC 7313P Firmware
AMD EPYC 7443P Firmware<milanpi-sp3_1.0.0.7
AMD EPYC 7443P Firmware
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 Firmware
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 Firmware
AMD EPYC 7663 Firmware<milanpi-sp3_1.0.0.7
AMD EPYC 7663 Firmware
AMD EPYC 7643P Firmware<milanpi-sp3_1.0.0.7
AMD EPYC 7643 Firmware
AMD EPYC 7573X Firmware<milanpi-sp3_1.0.0.7
AMD EPYC 7573X Firmware
AMD EPYC 75F3 Firmware<milanpi-sp3_1.0.0.7
AMD EPYC 75F3 Firmware
AMD EPYC 7513 Firmware<milanpi-sp3_1.0.0.7
AMD EPYC 7513 Firmware
AMD EPYC 7473X Firmware<milanpi-sp3_1.0.0.7
AMD EPYC 7473X Firmware
Amd Epyc Server Firmware<milanpi-sp3_1.0.0.7
AMD EPYC Server
AMD EPYC 74F3 Firmware<milanpi-sp3_1.0.0.7
AMD EPYC 74F3 Firmware
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 Firmware
AMD EPYC 7373X Firmware<milanpi-sp3_1.0.0.7
AMD EPYC 7373X Firmware
Amd Epyc Server Firmware<milanpi-sp3_1.0.0.7
AMD EPYC 7343 Firmware
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-2021-26364?

    CVE-2021-26364 is categorized as a critical vulnerability due to its potential to cause a denial of service through insufficient bounds checking.

  • How do I fix CVE-2021-26364?

    To mitigate CVE-2021-26364, users should update the affected AMD EPYC firmware to the latest version available, specifically versions later than romepi-sp3_1.0.0.d or milanpi-sp3_1.0.0.7.

  • Who is affected by CVE-2021-26364?

    CVE-2021-26364 affects multiple models of AMD EPYC processors with specific firmware versions.

  • What risks are associated with CVE-2021-26364?

    The main risk with CVE-2021-26364 is the potential for denial of service, which could disrupt system availability.

  • Is there a known exploit for CVE-2021-26364?

    As of now, there is no public knowledge of an active exploit for CVE-2021-26364, but the vulnerability poses a significant risk.

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