Vulnerability in AMD 1st Gen Epyc™
CVE-2021-26320
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
Vulnerability class: Improper Certificate Validation
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.002 (7.8th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 8th percentile — 7.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: 0.000
Affected products
- AMD 1st Gen Epyc™ — versions unspecified
- AMD 2nd Gen Epyc™ — versions unspecified
- AMD 3rd Gen Epyc™ — versions unspecified
- AMD Epyc 7232p
- AMD Epyc 7232p Firmware
- AMD Epyc 7251
- AMD Epyc 7251 Firmware
- AMD Epyc 7252
- AMD Epyc 7252 Firmware
- AMD Epyc 7261
Weakness classification (CWE)
References
- www.amd.com/en/corporate/product-security/bulletin/amd-sb-1021 (Vendor Advisory)
Frequently asked questions
- What is CVE-2021-26320?
- CVE-2021-26320 is a medium-severity vulnerability in AMD 1st Gen Epyc™, classified under Improper Certificate Validation. CVSS score: 5.5/10. Published 2021-11-16.
- How severe is CVE-2021-26320?
- Medium severity. CVSS v3 base score is 5.5 out of 10.