Vulnerability Intelligence Report
CVE-2023-20578
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.
No Active Exploit Signals
CVSS Base Score
7.5
HIGH
Exploitability:0.9
Impact Score:6.1
EPSS Probability:0.12%
Executive Threat Verdict
Evaluating...
Evaluating Threat Landscape...
Assessing known weaponization, exploitation telemetry, and federal advisories.
Attack Surface
—
Authentication
—
Weaponization
—
SSVC Action
—
Weaknesses (CWE)
CWE-367 ↗CWE-367 Time-of-check Time-of-use (TOCTOU) Race Condition
Affected Products & Versions
| Vendor | Product | Affected Versions |
|---|---|---|
| AMD | AMD EPYC™ 7001 Processors | NaplesPI 1.0.0.K (unaffected) |
| AMD | AMD EPYC™ 7002 Processors | RomePI 1.0.0.G (unaffected) |
| AMD | AMD EPYC™ 7003 Processors | MilanPI 1.0.0.B (unaffected) |
| AMD | AMD EPYC™ 9004 Processors | GenoaPI 1.0.0.2 (unaffected) |
| AMD | AMD Ryzen™ 7000 Series Desktop Processors | ComboAM5 1.0.0.1 (unaffected) |
| AMD | AMD Ryzen™ Threadripper™ PRO 5000WX Processors | ChagallWSPI-sWRX8 1.0.0.7 (unaffected) |
| AMD | AMD Ryzen™ 7020 Series Processors with Radeon™ Graphics | MendocinoPI-FT6 1.0.0.0 (unaffected) |
| AMD | AMD Ryzen™ 6000 Series Processors with Radeon™ Graphics | RembrandtPI-FP7 1.0.0.9b (unaffected) |
| AMD | AMD Ryzen™ 7035 Series Processors with Radeon™ Graphics | RembrandtPI-FP7 1.0.0.9b (unaffected) |
| AMD | AMD EPYC™ Embedded 3000 | SnowyOwl PI 1.1.0.A (unaffected) |
| AMD | AMD EPYC™ Embedded 7002 | EmbRomePI-SP3 1.0.0.A (unaffected) |
| AMD | AMD EPYC™ Embedded 7003 | EmbMilanPI-SP3 1.0.0.7 (unaffected) |
| AMD | AMD EPYC™ Embedded 9003 | EmbGenoaPI-SP5 1.0.0.0 (unaffected) |
| AMD | AMD Ryzen™ Embedded 7000 | EmbeddedAM5PI 1.0.0.0 (unaffected) |
| AMD | AMD RyzenTM Embedded V3000 | EmbeddedPI-FP7r2 1.0.0.8 (unaffected) |
References & Technical Advisories
No reference links found.
Threat Intelligence Signals
EPSS Score
0.116%
GitHub Advisory
Identity & Timeline
| Status | PUBLISHED |
| Assigning Authority | Advanced Micro Devices Inc. · Vendor · USA |
| Reserved | 2022-10-27T18:53:39 |
| Published | 2024-08-13T16:52:58 |
| Patch Date | 2024-08-13 |
| Last Updated | 2025-03-18T20:03:43 |
Community Chatter & Buzz