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
EPSS: 0.002 (7.9th percentile) — read the EPSS interpretation.
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.
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
- psirt@amd.com (x_refsource_MISC, 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.