CVE-2021-26387

Severity CVSS v4.0:

Pending analysis

Type:

Unavailable / Other

Publication date:

13/08/2024

Last modified:

15/04/2026

Description

Insufficient access controls in ASP kernel may allow a<br /> privileged attacker with access to AMD signing keys and the BIOS menu or UEFI<br /> shell to map DRAM regions in protected areas, potentially leading to a loss of platform integrity.

Impact

Vector 3.x

CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:N/I:L/A:L CVSS v3.1 Severity and Metrics:

Base Score: 3.90 LOW
Vector: CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:N/I:L/A:L

Attack Vector (AV): Local
Attack Complexity (AC): High
Privileges Required (PR): High
User Interaction (UI): None
Scope (S): Changed
Confidentiality (C): None
Integrity (I): Low
Availability (A): Low

Base Score 3.x

3.90

Severity 3.x

LOW

References to Advisories, Solutions, and Tools

https://www.amd.com/en/resources/product-security/bulletin/amd-sb-3003.html
https://www.amd.com/en/resources/product-security/bulletin/amd-sb-5002.html