CVE-2021-26387

Published: Aug 13, 2024

Modified: Oct 30, 2024

PUBLISHED

CVSS v3.1

3.9

LOW

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.

Vendor	Product	Versions
AMD	AMD EPYC™ 7001 Series Processors	affected `various`
AMD	AMD EPYC™ 7002 Series Processors	affected `various`
AMD	AMD EPYC™ 7003 Series Processors	affected `various`
AMD	AMD EPYC™ 9004 Series Processors	affected `various`
AMD	AMD Ryzen™ 3000 Series Desktop Processors	unaffected `ComboAM4PI 1.0.0.9` unaffected `ComboAM4 V2 PI 1.2.0.8`
AMD	AMD Ryzen™ 5000 Series Desktop Processors	unaffected `ComboAM4 V2 PI 1.2.0.8`
AMD	AMD Ryzen™ 5000 Series Desktop Processor with Radeon™ Graphics	unaffected `ComboAM4v2 PI 1.2.0.6`
AMD	AMD Ryzen™ 7000 Series Desktop Processors	unaffected `ComboAM5 1.0.8.0`
AMD	AMD Athlon™ 3000 Series Desktop Processors with Radeon™ Graphics	unaffected `ComboAM4PI 1.0.0.9` unaffected `ComboAM4v2 PI 1.2.0.8`
AMD	AMD Ryzen™ 4000 Series Desktop Processors with Radeon™ Graphics	unaffected `ComboAM4v2 PI 1.2.0.5`
AMD	AMD Ryzen™ Threadripper™ 3000 Series Processors	unaffected `CastlePeakPI-SP3r3 1.0.0.7`
AMD	AMD Ryzen™ Threadripper™ PRO 3000WX Series Processors	unaffected `ChagallWSPI-sWRX8 1.0.0.2` unaffected `CastlePeakWSPI-sWRX8 1.0.0.9`
AMD	AMD Ryzen™ Threadripper™ PRO 5000WX Processors	unaffected `ChagallWSPI-sWRX8 1.0.0.2`
AMD	AMD Athlon™ 3000 Series Mobile Processors with Radeon™ Graphics	unaffected `PicassoPI-FP5 1.0.0.E`
AMD	AMD Athlon™ 3000 Series Mobile Processors with Radeon™ Graphics	unaffected `PollockPI-FT5 1.0.0.4`
AMD	AMD Ryzen™ 3000 Series Mobile Processor with Radeon™ Graphics	unaffected `PicassoPI-FP5 1.0.0.E`
AMD	AMD Ryzen™ 4000 Series Mobile Processors with Radeon™ Graphics	unaffected `RenoirPI-FP6 1.0.0.8`
AMD	AMD Ryzen™ 5000 Series Mobile Processors with Radeon™ Graphics	unaffected `CezannePI-FP6 1.0.0.9`
AMD	AMD Ryzen™ 5000 Series Mobile Processors with Radeon™ Graphics	unaffected `CezannePI-FP6 1.0.0.9`
AMD	AMD Ryzen™ 6000 Series Processors with Radeon™ Graphics	unaffected `RembrandtPI-FP7 1.0.0.9b`
AMD	AMD Ryzen™ 7035 Series Processors with Radeon™ Graphics	unaffected `RembrandtPI-FP7 1.0.0.9b`
AMD	AMD Ryzen™ 5000 Series Processors with Radeon™ Graphics	unaffected `CezannePI-FP6 1.0.0.9`
AMD	AMD Ryzen™ 3000 Series Processors with Radeon™ Graphics	unaffected `CezannePI-FP6 1.0.0.9`
AMD	AMD EPYC™ Embedded 3000 Series Processors	affected `various`
AMD	AMD EPYC™ Embedded 7002 Series Processors	affected `various`
AMD	AMD EPYC™ Embedded 7003 Series Processors	affected `various`
AMD	AMD EPYC™ Embedded 9003 Series Processors	affected `various`
AMD	AMD Ryzen™ Embedded R1000 Series Processors	unaffected `EmbeddedPI-FP5 1.2.0.A`
AMD	AMD Ryzen™ Embedded R2000 Series Processors	unaffected `EmbeddedR2KPI-FP5 1.0.0.2`
AMD	AMD Ryzen™ Embedded 5000 Series Processors	unaffected `EmbAM4PI 1.0.0.2`
AMD	AMD Ryzen™ Embedded V1000 Series Processors	unaffected `EmbeddedPI-FP5 1.2.0.A`
AMD	AMD Ryzen™ Embedded V2000 Series Processors	unaffected `EmbeddedPI-FP6 1.0.0.6`
AMD	AMD Ryzen™ Embedded V3000 Series Processors	unaffected `EmbeddedPI-FP7r2 1.0.0.9`

CVSS v3.1 Details

CVSS v3.1 Vector

CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:N/I:L/A:L

Attack Vector

Local

Attack Complexity

High

Privileges Required

High

User Interaction

None

Scope

Changed

Confidentiality

None

Integrity

Low

Availability

Low

References

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

vendor-advisory

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

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CVE-2021-26387

Description

Affected Products

CVSS v3.1 Details

References