Insufficient Validation in Elliptic Curve Points in SEV-Legacy Firmware by AMD
CVE-2021-26408

7.1HIGH

Key Information:

Vendor

Amd
Status
1st Gen Amd Epyc™
2nd Gen Amd Epyc™
Vendor
CVE Published:
10 May 2022

What is CVE-2021-26408?

The SEV-legacy firmware from AMD exhibits insufficient validation of elliptic curve points, which can lead to compromised migration processes for SEV-legacy guests. This vulnerability poses potential risks to both the integrity and confidentiality of guest systems, allowing attackers to exploit the flaw and threaten the secure operation of virtualized environments.

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Affected Version(s)

1st Gen AMD EPYC™ < unspecified

2nd Gen AMD EPYC™ < unspecified

References

https://www.amd.com/en/corporate/product-security/bulleti...
x_refsource_MISC

CVSS V3.1

Score:
7.1
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Local
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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