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Status published
High
CVE-2021-26344
An out of bounds memory write when processing the AMD PSP1...
Vulnerability Description
An out of bounds memory write when processing the AMD PSP1 Configuration Block (APCB) could allow an attacker with access the ability to modify the BIOS image, and the ability to sign the resulting image, to potentially modify the APCB block resulting in arbitrary code execution.
Impact Analysis
Refer to official advisory for detailed impact metrics.
Remediation
Ensure systems are updated to the latest vendor-supplied patch levels.
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Credits & Attribution
No credits recorded in the NVD database.
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Affected Vendor
Affected Software
AMD EPYC™ 7001 Series Processors, AMD EPYC™ 7002 Series Processors, AMD EPYC™ 7003 Series Processors, AMD Ryzen™ 3000 Series Desktop Processors, AMD Ryzen™ 5000 Series Desktop Processors, AMD Ryzen™ 5000 Series Desktop Processor with Radeon™ Graphics, AMD Athlon™ 3000 Series Desktop Processors with Radeon™ Graphics, AMD Ryzen™ 4000 Series Desktop Processors with Radeon™ Graphics, AMD Ryzen™ Threadripper™ 3000 Series Processors, AMD Ryzen™ Threadripper™ PRO 5000WX Processors, AMD Athlon™ 3000 Series Mobile Processors with Radeon™ Graphics, AMD Ryzen™ 3000 Series Mobile Processors with Radeon™ Graphics, AMD Ryzen™ 4000 Series Mobile Processors with Radeon™ Graphics, AMD Ryzen™ 5000 Series Mobile Processors with Radeon™ Graphics, AMD Ryzen™ 7020 Series Processors with Radeon™ Graphics, AMD Ryzen™ 6000 Series Processors with Radeon™ Graphics, AMD Ryzen™ 7035 Series Processors with Radeon™ Graphics, AMD Ryzen™ 5000 Series Processors with Radeon™ Graphics, AMD Ryzen™ 3000 Series Processors with Radeon™ Graphics, AMD EPYC™ Embedded 7002 Series Processors, AMD EPYC™ Embedded 3000 Series Processors, AMD EPYC™ Embedded 7003 Series Processors, AMD Ryzen™ Embedded R1000 Series Processors, AMD Ryzen™ Embedded R2000 Series Processors, AMD Ryzen™ Embedded 5000 Series Processors, AMD Ryzen™ Embedded V1000 Series Processors, AMD Ryzen™ Embedded V2000 Series Processors, AMD Ryzen™ Embedded V3000 Series Processors
Vulnerable Versions:
various, RomePI 1.0.0.C, MilanPI 1.0.0.5, ComboAM4V2 1.2.0.A, ChagallWSPI-sWRX8 1.0.0.6, CezannePI-FP6 1.0.0.E, MendocinoPI-FT6 1.0.0.3, RembrandtPI-FP7 1.0.0.7, EmbRomePI-SP3 1.0.0.6, Various, EmbMilanPI-SP3 1.0.0.2, v, EmbeddedPI-FP7r2 1.0.0.4
Timeline
Official Publish:
August 13th, 2024
Last Modified:
March 18th, 2025
Added to House:
July 21st, 2026
CVSS Vectors
V3:
CVSS:3.1/AV:L/AC:H/PR:H/UI:R/S:C/C:H/I:H/A:H
Weaknesses (CWE)
No CWE data available
MITRE ATT&CK TTPs
No associated TTPs found for this vulnerability.