Vulnerability Description
A TOCTOU in ASP bootloader may allow an attacker to tamper with the SPI ROM following data read to memory potentially resulting in S3 data corruption and information disclosure.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Amd | Epyc 7001 Firmware | < naplespi_1.0.0.h |
| Amd | Epyc 7001 | - |
| Amd | Epyc 7251 Firmware | < naplespi_1.0.0.h |
| Amd | Epyc 7251 | - |
| Amd | Epyc 7261 Firmware | < naplespi_1.0.0.h |
| Amd | Epyc 7261 | - |
| Amd | Epyc 7281 Firmware | < naplespi_1.0.0.h |
| Amd | Epyc 7281 | - |
| Amd | Epyc 7301 Firmware | < naplespi_1.0.0.h |
| Amd | Epyc 7301 | - |
| Amd | Epyc 7351 Firmware | < naplespi_1.0.0.h |
| Amd | Epyc 7351 | - |
| Amd | Epyc 7351P Firmware | < naplespi_1.0.0.h |
| Amd | Epyc 7351P | - |
| Amd | Epyc 7371 Firmware | < naplespi_1.0.0.h |
| Amd | Epyc 7371 | - |
| Amd | Epyc 7401 Firmware | < naplespi_1.0.0.h |
| Amd | Epyc 7401 | - |
| Amd | Epyc 7401P Firmware | < naplespi_1.0.0.h |
| Amd | Epyc 7401P | - |
Related Weaknesses (CWE)
References
- https://www.amd.com/en/corporate/product-security/bulletin/AMD-SB-3001Vendor Advisory
- https://www.amd.com/en/corporate/product-security/bulletin/AMD-SB-4001Vendor Advisory
- https://www.amd.com/en/corporate/product-security/bulletin/AMD-SB-3001Vendor Advisory
- https://www.amd.com/en/corporate/product-security/bulletin/AMD-SB-4001Vendor Advisory
FAQ
What is CVE-2021-26356?
CVE-2021-26356 is a vulnerability with a CVSS score of 7.4 (HIGH). A TOCTOU in ASP bootloader may allow an attacker to tamper with the SPI ROM following data read to memory potentially resulting in S3 data corruption and information disclosure.
How severe is CVE-2021-26356?
CVE-2021-26356 has been rated HIGH with a CVSS base score of 7.4/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2021-26356?
Check the references section above for vendor advisories and patch information. Affected products include: Amd Epyc 7001 Firmware, Amd Epyc 7001, Amd Epyc 7251 Firmware, Amd Epyc 7251, Amd Epyc 7261 Firmware.