What is CVE-2021-26353?

CVE-2021-26353 is a high-severity vulnerability in Amd 3rd Gen Epyc, classified under Improper Initialization. CVSS score: 7.8/10. Published 2022-05-10.

How severe is CVE-2021-26353?

High severity. CVSS v3 base score is 7.8 out of 10.

Vulnerability in Amd 3rd Gen Epyc

CVE-2021-26353

Failure to validate inputs in SMM may allow an attacker to create a mishandled error leaving the DRTM UApp in a partially initialized state potentially resulting in loss of memory integrity.

Vulnerability class: Dirty Pipe (CVE-2022-0847)

EPSS: 0.003 (16.9th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

Affected products

Amd 3rd Gen Epyc — versions various
Amd Epyc_72f3
Amd Epyc_72f3_firmware
Amd Epyc_7313
Amd Epyc_7313_firmware
Amd Epyc_7313p
Amd Epyc_7313p_firmware
Amd Epyc_7343
Amd Epyc_7343_firmware
Amd Epyc_7373x

Weakness classification (CWE)

CWE-665 — Improper Initialization

References

psirt@amd.com (vendor-advisory)

Frequently asked questions

What is CVE-2021-26353?: CVE-2021-26353 is a high-severity vulnerability in Amd 3rd Gen Epyc, classified under Improper Initialization. CVSS score: 7.8/10. Published 2022-05-10.
How severe is CVE-2021-26353?: High severity. CVSS v3 base score is 7.8 out of 10.