Processor vulnerability
CVE-2024-21925
The UEFI module that passes messages between the Secure Processor and x86 did not validate its input buffers, letting a privileged attacker overwrite SMRAM.
- Name
- AmdPspP2CmboxV2 input validation
- Vulnerability
- AMD AGESA, SMM and BIOS firmware
- Kind
- Firmware
- CVE published
- 2025-02-11 CVE record
- Advisories
- AMD-SB-7027
AmdPspP2CmboxV2 is the AGESA UEFI module behind the mailbox from the
AMD Secure Processor to the x86 side. Quarkslab found that it did
not validate its input buffers, so an attacker at ring 0 could
overwrite SMRAM and run code in System Management Mode. Unlike
CVE-2024-0179 from the same report, it reaches every EPYC generation
from Naples to Genoa, the MI300A and the embedded EPYC lines as well
as the client parts.What the sources say of each microarchitecture.
Affected processors
5 of the 5 microarchitectures listed are affected in all or some of their models.
| Microarchitecture | Status | Detail | Source |
|---|---|---|---|
| Zen | Affected | EPYC 7001 (Naples), Athlon 3000 mobile, EPYC Embedded 3000, Ryzen Embedded R1000 and V1000 | amd.com |
| Zen+ | Affected | Ryzen Embedded R2000 | amd.com |
| Zen 2 | Affected | EPYC 7002 (Rome), Ryzen 3000 desktop, Ryzen 4000, Ryzen 7020, Threadripper 3000 and PRO 3000 WX, EPYC Embedded 7002, Ryzen Embedded V2000 | amd.com |
| Zen 3 | Affected | EPYC 7003 (Milan), Ryzen 5000, Ryzen 6000, Ryzen 7035, Threadripper PRO 5000 WX, EPYC Embedded 7003, Ryzen Embedded 5000 and V3000 | amd.com |
| Zen 4 | Affected | EPYC 9004 (Genoa), Ryzen 7000, 7040, 7045 and 8000, Threadripper PRO 7000 WX, EPYC Embedded 9004, Ryzen Embedded 7000 and 8000 | amd.com |
Mitigations
- Firmware: NaplesPI 1.0.0.N, RomePI 1.0.0.K, MilanPI 1.0.0.E, GenoaPI 1.0.0.D, MI300PI 1.0.0.5 and the client and embedded PI versions the bulletin lists. Source.
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