What is CVE-2021-26355?

CVE-2021-26355 is a medium-severity vulnerability in Amd 3rd Gen Epyc, classified under Protection Mechanism Failure. CVSS score: 5.5/10. Published 2023-01-11.

How severe is CVE-2021-26355?

Medium severity. CVSS v3 base score is 5.5 out of 10.

Vulnerability in Amd 3rd Gen Epyc

CVE-2021-26355

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.

EPSS: 0.002 (6.7th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

Affected products

Amd 3rd Gen Epyc — versions various
Amd Epyc_7003
Amd Epyc_7003_firmware
Amd Epyc_72f3
Amd Epyc_72f3_firmware
Amd Epyc_7313
Amd Epyc_7313_firmware
Amd Epyc_7313p
Amd Epyc_7313p_firmware
Amd Epyc_7343

Weakness classification (CWE)

CWE-693 — Protection Mechanism Failure

References

psirt@amd.com (vendor-advisory, Vendor Advisory)

Frequently asked questions

What is CVE-2021-26355?: CVE-2021-26355 is a medium-severity vulnerability in Amd 3rd Gen Epyc, classified under Protection Mechanism Failure. CVSS score: 5.5/10. Published 2023-01-11.
How severe is CVE-2021-26355?: Medium severity. CVSS v3 base score is 5.5 out of 10.