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.
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.
| Vendor | Product | Versions |
|---|---|---|
| AMD | AMD EPYC™ 7001 Processors | NaplesPI 1.0.0.K |
| AMD | AMD EPYC™ 7002 Processors | RomePI 1.0.0.G |
| AMD | AMD EPYC™ 7003 Processors | MilanPI 1.0.0.B |
| AMD | AMD EPYC™ 9004 Processors | GenoaPI 1.0.0.2 |
| AMD | AMD Ryzen™ 7000 Series Desktop Processors | ComboAM5 1.0.0.1 |
| AMD | AMD Ryzen™ Threadripper™ PRO 5000WX Processors | ChagallWSPI-sWRX8 1.0.0.7 |
| AMD | AMD Ryzen™ 7020 Series Processors with Radeon™ Graphics | MendocinoPI-FT6 1.0.0.0 |
| AMD | AMD Ryzen™ 6000 Series Processors with Radeon™ Graphics | RembrandtPI-FP7 1.0.0.9b |
| AMD | AMD Ryzen™ 7035 Series Processors with Radeon™ Graphics | RembrandtPI-FP7 1.0.0.9b |
| AMD | AMD EPYC™ Embedded 3000 | SnowyOwl PI 1.1.0.A |
| AMD | AMD EPYC™ Embedded 7002 | EmbRomePI-SP3 1.0.0.A |
| AMD | AMD EPYC™ Embedded 7003 | EmbMilanPI-SP3 1.0.0.7 |
| AMD | AMD EPYC™ Embedded 9003 | EmbGenoaPI-SP5 1.0.0.0 |
| AMD | AMD Ryzen™ Embedded 7000 | EmbeddedAM5PI 1.0.0.0 |
| AMD | AMD RyzenTM Embedded V3000 | EmbeddedPI-FP7r2 1.0.0.8 |
Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.
For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.
Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.
No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.