CVE-2021-26403

MediumCVSS 6.5/10Last modified Jun 17, 2026

Description

Insufficient checks in SEV may lead to a malicious hypervisor disclosing the launch secret potentially resulting in compromise of VM confidentiality.

Metrics

CVSS 3.1 6.5/10CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N

Weakness enumeration

CWE-345

Affected software

VendorProductVersions
AMD1st Gen EPYCvarious
AMD2nd Gen EPYCvarious

References

Timeline

Published
Jan 11, 2023
Last modified
Jun 17, 2026
NVD status
Modified

Related CVEs from 2021

CVE-2021-264045.5Improper input validation and bounds checking in SEV firmware may leak scratch buffer bytes leading to potential information disclosure.CVE-2021-264067.5Insufficient validation in parsing Owner's Certificate Authority (OCA) certificates in SEV (AMD Secure Encrypted Virtualization) and SEV-ES 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 Vulnerability
CVE-2021-26403: Medium severity, CVSS 6.5 | Vulnix