What is CVE-2021-26379?

CVE-2021-26379 is a critical-severity vulnerability in Amd 2nd Gen Epyc™. CVSS score: 9.8/10. Published 2023-05-09.

How severe is CVE-2021-26379?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Vulnerability in Amd 2nd Gen Epyc™

CVE-2021-26379

Insufficient input validation of mailbox data in the SMU may allow an attacker to coerce the SMU to corrupt SMRAM, potentially leading to a loss of integrity and privilege escalation.

EPSS: 0.007 (48.5th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Amd 2nd Gen Epyc™ — versions various
Amd 3rd Gen Epyc™ — versions various
Amd Epyc_7232p
Amd Epyc_7232p_firmware
Amd Epyc_7252
Amd Epyc_7252_firmware
Amd Epyc_7262
Amd Epyc_7262_firmware
Amd Epyc_7272
Amd Epyc_7272_firmware

References

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

Frequently asked questions

What is CVE-2021-26379?: CVE-2021-26379 is a critical-severity vulnerability in Amd 2nd Gen Epyc™. CVSS score: 9.8/10. Published 2023-05-09.
How severe is CVE-2021-26379?: Critical severity. CVSS v3 base score is 9.8 out of 10.