What is CVE-2021-26396?

CVE-2021-26396 is a medium-severity vulnerability in Amd 3rd Gen Epyc, classified under Insufficient Verification of Data Authenticity. CVSS score: 4.4/10. Published 2023-01-11.

How severe is CVE-2021-26396?

Medium severity. CVSS v3 base score is 4.4 out of 10.

Vulnerability in Amd 3rd Gen Epyc

CVE-2021-26396

Insufficient validation of address mapping to IO in ASP (AMD Secure Processor) may result in a loss of memory integrity in the SNP guest.

EPSS: 0.001 (1.7th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 4.4 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L.

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-345 — Insufficient Verification of Data Authenticity

References

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

Frequently asked questions

What is CVE-2021-26396?: CVE-2021-26396 is a medium-severity vulnerability in Amd 3rd Gen Epyc, classified under Insufficient Verification of Data Authenticity. CVSS score: 4.4/10. Published 2023-01-11.
How severe is CVE-2021-26396?: Medium severity. CVSS v3 base score is 4.4 out of 10.