What is CVE-2021-26403?

CVE-2021-26403 is a medium-severity vulnerability in Amd 1st Gen Epyc, classified under Insufficient Verification of Data Authenticity. CVSS score: 6.5/10. Published 2023-01-11.

How severe is CVE-2021-26403?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Vulnerability in Amd 1st Gen Epyc

CVE-2021-26403

Insufficient checks in SEV may lead to a malicious hypervisor disclosing the launch secret potentially resulting in compromise of VM confidentiality.

EPSS: 0.001 (2.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N.

Affected products

Amd 1st Gen Epyc — versions various
Amd 2nd Gen Epyc — versions various
Amd Epyc_7001
Amd Epyc_7001_firmware
Amd Epyc_7002
Amd Epyc_7002_firmware
Amd Epyc_7232p
Amd Epyc_7232p_firmware
Amd Epyc_7251
Amd Epyc_7251_firmware

Weakness classification (CWE)

CWE-345 — Insufficient Verification of Data Authenticity

References

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

Frequently asked questions

What is CVE-2021-26403?: CVE-2021-26403 is a medium-severity vulnerability in Amd 1st Gen Epyc, classified under Insufficient Verification of Data Authenticity. CVSS score: 6.5/10. Published 2023-01-11.
How severe is CVE-2021-26403?: Medium severity. CVSS v3 base score is 6.5 out of 10.