CVE-2021-26387

LOW

AMD EPYC and Ryzen Processors - Insufficient Access Control in ASP Kernel

Title source: llm
STIX 2.1

Description

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

References (2)

Core 2

Scores

CVSS v3 3.9
EPSS 0.0002
EPSS Percentile 6.6%
Attack Vector LOCAL
CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:N/I:L/A:L

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact partial

Details

CWE
CWE-863
Status published
Products (36)
AMD/AMD Athlon™ 3000 Series Desktop Processors with Radeon™ Graphics ComboAM4PI 1.0.0.9
AMD/AMD Athlon™ 3000 Series Desktop Processors with Radeon™ Graphics ComboAM4v2 PI 1.2.0.8
AMD/AMD Athlon™ 3000 Series Mobile Processors with Radeon™ Graphics PicassoPI-FP5 1.0.0.E
AMD/AMD Athlon™ 3000 Series Mobile Processors with Radeon™ Graphics PollockPI-FT5 1.0.0.4
AMD/AMD EPYC™ 7001 Series Processors various
AMD/AMD EPYC™ 7002 Series Processors various
AMD/AMD EPYC™ 7003 Series Processors various
AMD/AMD EPYC™ 9004 Series Processors various
AMD/AMD EPYC™ Embedded 3000 Series Processors various
AMD/AMD EPYC™ Embedded 7002 Series Processors various
... and 26 more
Published Aug 13, 2024
Tracked Since Feb 18, 2026