Insufficient Validation Vulnerability in AMD SEV Firmware
CVE-2021-26320

5.5MEDIUM

Key Information:

Vendor

Amd
Status
1st Gen Amd Epyc™
2nd Gen Amd Epyc™
3rd Gen Amd Epyc™
Vendor
CVE Published:
16 November 2021

What is CVE-2021-26320?

A vulnerability exists in the AMD SEV Firmware due to insufficient validation of the AMD SEV Signing Key (ASK) during the SEND_START command. This security flaw could allow a local authenticated attacker to execute a denial of service attack against the Platform Security Processor (PSP), potentially impacting system availability and integrity. Users are advised to review security advisories and apply necessary patches to their systems.

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Affected Version(s)

1st Gen AMD EPYC™ < unspecified

2nd Gen AMD EPYC™ < unspecified

3rd Gen AMD EPYC™ < unspecified

References

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

CVSS V3.1

Score:
5.5
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Local
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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