Vulnerability Description
Insufficient bounds checking in ASP (AMD Secure Processor) firmware while handling BIOS mailbox commands, may allow an attacker to write partially-controlled data out-of-bounds to SMM or SEV-ES regions which may lead to a potential loss of integrity and availability.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Amd | Epyc 7H12 Firmware | < romepi_1.0.0.c |
| Amd | Epyc 7H12 | - |
| Amd | Epyc 7F72 Firmware | < romepi_1.0.0.c |
| Amd | Epyc 7F72 | - |
| Amd | Epyc 7F52 Firmware | < romepi_1.0.0.c |
| Amd | Epyc 7F52 | - |
| Amd | Epyc 7F32 Firmware | < romepi_1.0.0.c |
| Amd | Epyc 7F32 | - |
| Amd | Epyc 7742 Firmware | < romepi_1.0.0.c |
| Amd | Epyc 7742 | - |
| Amd | Epyc 7702P Firmware | < romepi_1.0.0.c |
| Amd | Epyc 7702P | - |
| Amd | Epyc 7702 Firmware | < romepi_1.0.0.c |
| Amd | Epyc 7702 | - |
| Amd | Epyc 7662 Firmware | < romepi_1.0.0.c |
| Amd | Epyc 7662 | - |
| Amd | Epyc 7642 Firmware | < romepi_1.0.0.c |
| Amd | Epyc 7642 | - |
| Amd | Epyc 7552 Firmware | < romepi_1.0.0.c |
| Amd | Epyc 7552 | - |
Related Weaknesses (CWE)
References
- https://www.amd.com/en/corporate/product-security/bulletin/AMD-SB-1032Vendor Advisory
- https://www.amd.com/en/corporate/product-security/bulletin/AMD-SB-1032Vendor Advisory
FAQ
What is CVE-2021-26402?
CVE-2021-26402 is a vulnerability with a CVSS score of 7.1 (HIGH). Insufficient bounds checking in ASP (AMD Secure Processor) firmware while handling BIOS mailbox commands, may allow an attacker to write partially-controlled data out-of-bounds to SMM or SEV-ES region...
How severe is CVE-2021-26402?
CVE-2021-26402 has been rated HIGH with a CVSS base score of 7.1/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2021-26402?
Check the references section above for vendor advisories and patch information. Affected products include: Amd Epyc 7H12 Firmware, Amd Epyc 7H12, Amd Epyc 7F72 Firmware, Amd Epyc 7F72, Amd Epyc 7F52 Firmware.