Vulnerability record/PUBLISHED/Published Nov 10, 2026 22:12:15 UTC

CVE-2026-0454

An out-of-bounds write in the AMD Secure Encrypted Virtualization (SEV) firmware could allow a malicious hypervisor to corrupt global firmware variables, potentially resulting in loss of integrity.

Base score4.6/ 10

SeverityMediumCVSS 4.0

Exploitability / impact

CVSS metric breakdown

Vector-derived attributes

Base severityMedium

Attack vectorLocalAV

Attack complexityLowAC

Attack requirementsNoneAT

Privileges requiredHighPR

User interactionNoneUI

Vulnerable system confidentialityNoneVC

Vulnerable system integrityLowVI

Vulnerable system availabilityNoneVA

Subsequent system confidentialityNoneSC

Subsequent system integrityNoneSI

Subsequent system availabilityNoneSA

CVSS vector stringCVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N

CVSS communicates standardized severity and impact characteristics. It does not establish whether a system is exploitable in your specific environment.

Record context

CVE Numbering AuthorityAMD

Last updatedNov 12, 2026 23:52:53 UTC

PublishedNov 10, 2026 22:12:15 UTC

ReservedDec 6, 2025 13:53:59 UTC