Vulnerability in AMD 1st Gen Epyc™ Processors
CVE-2021-26406
Insufficient validation in parsing Owner's Certificate Authority (OCA) certificates in SEV (AMD Secure Encrypted Virtualization) and SEV-ES user application can lead to a host crash potentially resulting in denial of service.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.004 (34.5th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 35th percentile — 34.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000
Affected products
- AMD 1st Gen Epyc™ Processors — versions various
- AMD 2nd Gen Epyc™ Processors — versions various
- AMD 2nd Gen Ryzen™ Threadripper™ Processors “Colfax” — versions various
- AMD 3rd Gen Ryzen™ Threadripper™ Processors “Castle Peak” Hedt — versions various
- AMD Ryzen™ 5000 Series Desktop Processors “Vermeer” Am4 — versions various
- AMD Athlon™ 3000 Series Mobile Processors With Radeon™ Graphics “Dali”/”dali” Ulp — versions various
- AMD Athlon™ 3000 Series Mobile Processors With Radeon™ Graphics “Pollock” — versions various
- AMD Epyc 7232p
- AMD Epyc 7232p Firmware — versions romepi_1.0.0.a
- AMD Epyc 7251
References
- www.amd.com/en/corporate/product-security/bulletin/AMD-SB-4001 (vendor-advisory, Vendor Advisory)
- www.amd.com/en/corporate/product-security/bulletin/AMD-SB-3001 (vendor-advisory, Vendor Advisory)
Frequently asked questions
- What is CVE-2021-26406?
- CVE-2021-26406 is a high-severity vulnerability in AMD 1st Gen Epyc™ Processors. CVSS score: 7.5/10. Published 2023-05-09.
- How severe is CVE-2021-26406?
- High severity. CVSS v3 base score is 7.5 out of 10.