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Published: 12 March 2024

Incorrect calculation in microcode keying mechanism for some Intel(R) Xeon(R) D Processors with Intel(R) SGX may allow a privileged user to potentially enable information disclosure via local access.

From the Ubuntu Security Team

It was discovered that some Intel® Xeon® D Processors did not properly calculate the SGX base key when using Intel® SGX. A privileged local attacker could use this to obtain sensitive information.



Cvss 3 Severity Score


Score breakdown


Package Release Status
Launchpad, Ubuntu, Debian
bionic Needs triage

focal Needs triage

jammy Needs triage

mantic Needs triage

trusty Ignored
(trusty doesn't support early microcode loading at runtime)
upstream Needs triage

xenial Needs triage

Severity score breakdown

Parameter Value
Base score 5.3
Attack vector Local
Attack complexity High
Privileges required High
User interaction None
Scope Changed
Confidentiality High
Integrity impact None
Availability impact None
Vector CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:N/A:N