VulnerabilityModified

CVE-2021-26326

Failure to validate VM_HSAVE_PA during SNP_INIT may result in a loss of memory integrity.

HIGH 7.8EPSS 0.26%

Does this matter?

High impact if exploited, but EPSS currently rates exploitation as unlikely (0.26%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.

Description

Failure to validate VM_HSAVE_PA during SNP_INIT may result in a loss of memory integrity.

CVSS 3.1: 7.8 HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS: 0.26% probability · 18th percentile
CISA KEV: Not listed
Weakness: CWE-665
Affected: amd/epyc 7232p firmware · amd/epyc 7763 firmware · amd/epyc 7713p firmware · amd/epyc 7713 firmware · amd/epyc 7663 firmware · amd/epyc 7643 firmware · amd/epyc 75f3 firmware · amd/epyc 7543p firmware · amd/epyc 7543 firmware · amd/epyc 7513 firmware · amd/epyc 7453 firmware · amd/epyc 74f3 firmware · amd/epyc 7443p firmware · amd/epyc 7443 firmware · amd/epyc 7413 firmware · amd/epyc 73f3 firmware · amd/epyc 7343 firmware · amd/epyc 7313p firmware · amd/epyc 7313 firmware · amd/epyc 72f3 firmware
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.