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Status published
High
CVE-2023-20578
A TOCTOU (Time-Of-Check-Time-Of-Use) in SMM may allow an attacker with ring0...
Vulnerability Description
A TOCTOU (Time-Of-Check-Time-Of-Use) in SMM may allow an attacker with ring0 privileges and access to the BIOS menu or UEFI shell to modify the communications buffer potentially 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 Processors, AMD EPYC™ 7002 Processors, AMD EPYC™ 7003 Processors, AMD EPYC™ 9004 Processors, AMD Ryzen™ 7000 Series Desktop Processors, AMD Ryzen™ Threadripper™ PRO 5000WX Processors, 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 EPYC™ Embedded 3000, AMD EPYC™ Embedded 7002, AMD EPYC™ Embedded 7003, AMD EPYC™ Embedded 9003, AMD Ryzen™ Embedded 7000, AMD RyzenTM Embedded V3000
Vulnerable Versions:
NaplesPI 1.0.0.K, RomePI 1.0.0.G, MilanPI 1.0.0.B, GenoaPI 1.0.0.2, ComboAM5 1.0.0.1, ChagallWSPI-sWRX8 1.0.0.7, MendocinoPI-FT6 1.0.0.0, RembrandtPI-FP7 1.0.0.9b, SnowyOwl PI 1.1.0.A, EmbRomePI-SP3 1.0.0.A, EmbMilanPI-SP3 1.0.0.7, EmbGenoaPI-SP5 1.0.0.0, EmbeddedAM5PI 1.0.0.0, EmbeddedPI-FP7r2 1.0.0.8
Timeline
Official Publish:
August 13th, 2024
Last Modified:
March 18th, 2025
Added to House:
July 22nd, 2026
CVSS Vectors
V3:
CVSS:3.1/AV:L/AC:H/PR:H/UI:N/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.