high
7.8
CWE
284
Advisory Published
Updated

CVE-2021-26338

First published: Tue Nov 16 2021(Updated: )

Improper access controls in System Management Unit (SMU) may allow for an attacker to override performance control tables located in DRAM resulting in a potential lack of system resources.

Credit: psirt@amd.com

Affected SoftwareAffected VersionHow to fix
AMD EPYC 7F72 Firmware<romepi-sp3_1.0.0.c
AMD EPYC 7F72
AMD EPYC 7F52 Firmware<romepi-sp3_1.0.0.c
AMD EPYC 7F52
AMD EPYC 7F32 Firmware<romepi-sp3_1.0.0.c
AMD EPYC 7F32 Firmware
AMD EPYC 7H12 Firmware<romepi-sp3_1.0.0.c
AMD EPYC 7H12
AMD EPYC 7742 firmware<romepi-sp3_1.0.0.c
AMD EPYC 7742 firmware
AMD EPYC 7702 Firmware<romepi-sp3_1.0.0.c
AMD EPYC 7702
AMD EPYC 7702 Firmware<romepi-sp3_1.0.0.c
AMD EPYC 7702p
AMD EPYC 7662 Firmware<romepi-sp3_1.0.0.c
AMD EPYC 7662
AMD EPYC 7642 Firmware<romepi-sp3_1.0.0.c
AMD EPYC 7642 Firmware
AMD EPYC 7552 Firmware<romepi-sp3_1.0.0.c
AMD EPYC Embedded 7552
AMD EPYC 7542 Firmware<romepi-sp3_1.0.0.c
AMD EPYC 7542
AMD EPYC 7532 Firmware<romepi-sp3_1.0.0.c
AMD EPYC 7532
Amd Epyc Server Firmware<romepi-sp3_1.0.0.c
AMD EPYC 7502
AMD EPYC 7502P Firmware<romepi-sp3_1.0.0.c
AMD EPYC 7502P
AMD EPYC 7452 Firmware<romepi-sp3_1.0.0.c
AMD EPYC 7452
Amd Epyc Server Firmware<romepi-sp3_1.0.0.c
AMD EPYC 7402
AMD EPYC 7402P Firmware<romepi-sp3_1.0.0.c
AMD EPYC 7402P
AMD EPYC 7352 firmware<romepi-sp3_1.0.0.c
AMD EPYC 7352
Amd Epyc Server Firmware<romepi-sp3_1.0.0.c
AMD EPYC 7302P
AMD EPYC 7302P Firmware<romepi-sp3_1.0.0.c
AMD EPYC 7302P
AMD EPYC 7282 Firmware<romepi-sp3_1.0.0.c
AMD EPYC 7282
AMD EPYC 7272 firmware<romepi-sp3_1.0.0.c
AMD EPYC 7272 firmware
AMD EPYC 7262 Firmware<romepi-sp3_1.0.0.c
AMD EPYC 7262 Firmware
AMD EPYC 7252 Firmware<romepi-sp3_1.0.0.c
AMD EPYC 7252 Firmware
AMD EPYC 7232p firmware<romepi-sp3_1.0.0.c
AMD EPYC 7232p firmware
AMD EPYC 7763 Firmware<milanpi-sp3_1.0.0.4
AMD EPYC 7763 Firmware
AMD EPYC 7713P Firmware<milanpi-sp3_1.0.0.4
AMD EPYC 7713P Firmware
AMD EPYC 7713P Firmware<milanpi-sp3_1.0.0.4
AMD EPYC 7713
AMD EPYC 7663 Firmware<milanpi-sp3_1.0.0.4
AMD EPYC 7663 Firmware
AMD EPYC 7643 Firmware<milanpi-sp3_1.0.0.4
AMD EPYC 7643
AMD EPYC 75F3 Firmware<milanpi-sp3_1.0.0.4
AMD EPYC 75F3
AMD EPYC 7543P Firmware<milanpi-sp3_1.0.0.4
AMD EPYC 7543P Firmware
Amd Epyc Server Firmware<milanpi-sp3_1.0.0.4
AMD EPYC 7543 Firmware
AMD EPYC 7513 Firmware<milanpi-sp3_1.0.0.4
AMD EPYC 7513
Amd Epyc Server Firmware<milanpi-sp3_1.0.0.4
AMD EPYC 7453
AMD EPYC 74F3 Firmware<milanpi-sp3_1.0.0.4
AMD EPYC 74F3
AMD EPYC 7443P Firmware<milanpi-sp3_1.0.0.4
AMD EPYC 7443P
AMD EPYC 7443 Firmware<milanpi-sp3_1.0.0.4
AMD EPYC 7443
AMD EPYC 7413 Firmware<milanpi-sp3_1.0.0.4
AMD EPYC 7413 Firmware
AMD EPYC 73F3 Firmware<milanpi-sp3_1.0.0.4
AMD EPYC 73F3
Amd Epyc Server Firmware<milanpi-sp3_1.0.0.4
AMD EPYC 7343
AMD EPYC 7313P Firmware<milanpi-sp3_1.0.0.4
AMD EPYC 7313P
Amd Epyc Server Firmware<milanpi-sp3_1.0.0.4
AMD EPYC 7313P
AMD EPYC 72F3 Firmware<milanpi-sp3_1.0.0.4
AMD EPYC 72F3 Firmware

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Reference Links

Frequently Asked Questions

  • What is the severity of CVE-2021-26338?

    CVE-2021-26338 has a medium severity rating due to improper access controls that may lead to system resource issues.

  • How do I fix CVE-2021-26338?

    To fix CVE-2021-26338, update your AMD EPYC firmware to the latest version that mitigates this vulnerability.

  • Which systems are affected by CVE-2021-26338?

    CVE-2021-26338 affects certain versions of AMD EPYC firmware including 7f72, 7f52, 7f32, and others up to version romepi-sp3_1.0.0.c.

  • What impact does CVE-2021-26338 have on systems?

    Exploitation of CVE-2021-26338 may allow an attacker to override performance control tables in DRAM, potentially compromising system performance.

  • Is CVE-2021-26338 exploitable remotely?

    CVE-2021-26338 requires local access to the affected systems, limiting the scope of potential remote exploitation.

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