CVE-2021-26406

HighCVSS 7.5/10Last modified Jun 17, 2026

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.

Metrics

CVSS 3.1 7.5/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected software

VendorProductVersions
AMDRyzen™ 2000 series Desktop Processors “Raven Ridge” AM4various
AMDRyzen™ 2000 Series Desktop Processors “Pinnacle Ridge”various
AMDRyzen™ 3000 Series Desktop Processors “Matisse” AM4various
AMDAMD Ryzen™ 5000 Series Desktop Processors “Vermeer” AM4various
AMD2nd Gen AMD Ryzen™ Threadripper™ Processors “Colfax”various
AMD3rd Gen AMD Ryzen™ Threadripper™ Processors “Castle Peak” HEDTvarious
AMDRyzen™ Threadripper™ PRO Processors “Castle Peak” WSvarious
AMDAthlon™ 3000 Series Mobile Processors with Radeon™ Graphics “Dali”/”Dali” ULPvarious
AMDAthlon™ 3000 Series Mobile Processors with Radeon™ Graphics “Pollock”various
AMDRyzen™ 2000 Series Mobile Processors “Raven Ridge” FP5various
AMDRyzen™ 3000 Series Mobile processor, 2nd Gen AMD Ryzen™ Mobile Processors with Radeon™ Graphics “Picasso”various
AMD1st Gen AMD EPYC™ Processorsvarious
AMD2nd Gen AMD EPYC™ Processorsvarious

References

Timeline

Published
May 9, 2023
Last modified
Jun 17, 2026
NVD status
Modified

Related CVEs from 2021

CVE-2021-264075.5A randomly generated Initialization Vector (IV) may lead to a collision of IVs with the same key potentially resulting in information discloCVE-2021-264087.1Insufficient validation of elliptic curve points in SEV-legacy firmware may compromise SEV-legacy guest migration potentially resulting in lCVE-2021-264097.8Insufficient bounds checking in SEV-ES may allow an attacker to corrupt Reverse Map table (RMP) memory, potentially resulting in a loss of SCVE-2021-264101.8Improper syscall input validation in ASP (AMD Secure Processor) may force the kernel into reading syscall parameter values from its own memoCVE-2021-264118.8Internet Explorer Memory Corruption VulnerabilityCVE-2021-264129.1Microsoft Exchange Server Remote Code Execution VulnerabilityCVE-2021-264136.2Windows Installer Spoofing VulnerabilityCVE-2021-264144.8Windows DCOM Server Security Feature BypassCVE-2021-264157.8Windows Installer Elevation of Privilege VulnerabilityCVE-2021-264167.7Windows Hyper-V Denial of Service VulnerabilityCVE-2021-264175.5Windows Overlay Filter Information Disclosure VulnerabilityCVE-2021-264184.6Microsoft SharePoint Server Spoofing Vulnerability