CVE-2026-20917

Vulnerability in Intel processors allows exposure of sensitive information via shared microarchitectural predictor state during transient execution in VMX non-root (guest) operation. An unprivileged software adversary with an authenticated user can exploit this state to access data.

Improper handling of overlap between protected memory ranges in some microcode for some Intel(R) Processors within Ring 0: Hypervisor may allow an escalation of privilege. The attack requires a privileged user, low complexity, and local access, with no user interaction. The vulnerability impacts confidentiality, integrity, and availability (high).

Improper access control in some Intel processors in the user application layer may allow an escalation of privilege. The attack requires an authenticated user, high complexity, and special internal knowledge, but no user interaction. The vulnerability impacts confidentiality and integrity (high), with no impact on availability.

Improper handling of values in some Intel processors at Ring 0 (kernel, hypervisor, bare metal OS) may allow privilege escalation. An authorized adversary with a privileged user and a high complexity attack can escalate privileges via local access with special internal knowledge and no user interaction. The vulnerability may impact confidentiality and integrity but not availability.

A vulnerability in the microarchitecture of Intel processors allows disclosure of sensitive information during transient execution. An authenticated user with local access can potentially read data that should not be accessible.

Hardware allows activation of test or debug logic at runtime for some Intel(R) processors which may allow an unauthenticated user to potentially enable escalation of privilege via physical access.

Unchecked return value in the firmware for some Intel(R) Processors may allow a privileged user to potentially enable an escalation of privilege via local access. The vulnerability affects Intel processors.

Improper initialization in the firmware for some Intel processors may allow a privileged user to potentially enable a denial of service via local access.

Improper input validation in the firmware for some Intel processors may allow a privileged user to potentially enable escalation of privilege via local access.

Race condition in the firmware for some Intel(R) Processors may allow a privileged user to potentially enable escalation of privilege via local access. The vulnerability affects Intel processors.