Vulnerability · Published Nov 16, 2021 · Assigned by AMD
CVE-2021-26320
Medium 5.5
In plain English
A medium-severity improper certificate validation in 1st Gen AMD EPYC™ from AMD. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 8% of all known vulnerabilities).
Severity (CVSS NVD)5.5Medium
Exploit odds (30 days)0.2%top 91.7% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known
Official description
Insufficient validation of the AMD SEV Signing Key (ASK) in the SEND_START command in the SEV Firmware may allow a local authenticated attacker to perform a denial of service of the PSP
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| AMD | 1st Gen AMD EPYC™ | unspecified – before NaplesPI-SP3_1.0.0.G |
| AMD | 2nd Gen AMD EPYC™ | unspecified – before RomePI-SP3_1.0.0.C |
| AMD | 3rd Gen AMD EPYC™ | unspecified – before MilanPI-SP3_1.0.0.4 |
Weakness: CWE-295