VulnerabilityModified

CVE-2021-26408

Insufficient validation of elliptic curve points in SEV-legacy firmware may compromise SEV-legacy guest migration potentially resulting in loss of guest's integrity or confidentiality.

HIGH 7.1EPSS 0.27%

Does this matter?

High impact if exploited, but EPSS currently rates exploitation as unlikely (0.27%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.

Description

Insufficient validation of elliptic curve points in SEV-legacy firmware may compromise SEV-legacy guest migration potentially resulting in loss of guest's integrity or confidentiality.

CVSS 3.1: 7.1 HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
EPSS: 0.27% probability · 18th percentile
CISA KEV: Not listed
Affected: amd/epyc 7002 firmware · amd/epyc 7001 firmware · amd/epyc 7232p firmware · amd/epyc 7252 firmware · amd/epyc 7262 firmware · amd/epyc 7272 firmware · amd/epyc 7282 firmware · amd/epyc 7302 firmware · amd/epyc 7302p firmware · amd/epyc 7352 firmware · amd/epyc 7402 firmware · amd/epyc 7402p firmware · amd/epyc 7452 firmware · amd/epyc 7502 firmware · amd/epyc 7502p firmware · amd/epyc 7532 firmware · amd/epyc 7542 firmware · amd/epyc 7552 firmware · amd/epyc 7642 firmware · amd/epyc 7662 firmware · +18 more
Source: psirt@amd.com

References

https://www.amd.com/en/corporate/product-security/bulletin/amd-sb-1021Vendor Advisory
https://www.amd.com/en/corporate/product-security/bulletin/amd-sb-1021Vendor Advisory

Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.