CVE-2021-26406

HIGH

AMD EPYC Firmware - Denial of Service via OCA Certificate Parsing

Title source: llm
STIX 2.1

Description

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.

References (2)

Core 2

Scores

CVSS v3 7.5
EPSS 0.0047
EPSS Percentile 65.0%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CISA SSVC

Vulnrichment
Exploitation none
Automatable yes
Technical Impact partial

Details

Status published
Products (40)
amd/epyc_7232p_firmware romepi_1.0.0.a
amd/epyc_7251_firmware naplespi_1.0.0.e
amd/epyc_7252_firmware romepi_1.0.0.a
amd/epyc_7261_firmware naplespi_1.0.0.e
amd/epyc_7262_firmware romepi_1.0.0.a
amd/epyc_7272_firmware romepi_1.0.0.a
amd/epyc_7281_firmware naplespi_1.0.0.e
amd/epyc_7282_firmware romepi_1.0.0.a
amd/epyc_7301_firmware naplespi_1.0.0.e
amd/epyc_7302_firmware romepi_1.0.0.a
... and 30 more
Published May 09, 2023
Tracked Since Feb 18, 2026