Out-of-Bounds Memory Access Vulnerability in AMD Bootloader
CVE-2021-46760

9.8CRITICAL

Key Information:

Vendor

Amd
Status
3rd Gen Amd Ryzen™ Threadripper™ Processors “castle Peak” Hedt
Ryzen™ Threadripper™ Pro Processors “castle Peak” Ws
Vendor
CVE Published:
9 May 2023

What is CVE-2021-46760?

A vulnerability exists in the AMD bootloader that can be exploited by malicious or compromised User Applications (UApps) or Application Bootloaders (ABL). An attacker can send a malformed system call to the bootloader, leading to out-of-bounds memory access. This breach could allow unauthorized users to leak sensitive information or potentially execute arbitrary code, posing significant risks to system integrity and data security.

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Affected Version(s)

3rd Gen AMD Ryzen™ Threadripper™ Processors “Castle Peak” HEDT x86 various

Ryzen™ Threadripper™ PRO Processors “Castle Peak” WS x86 various

References

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

CVSS V3.1

Score:
9.8
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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