Common Weakness Enumeration

    CWE Definition / CWE-1421

    CWE-1421: Exposure of Sensitive Information in Shared Microarchitectural Structures during Transient Execution

    A processor event may allow transient operations to access architecturally restricted data (for example, in another address space) in a shared microarchitectural structure (for example, a CPU cache), potentially exposing the data over a covert channel.

    Published:19 Sep 2023
    Organization:MITRE
    Modified:11 Dec 2025

    Related Weakness

    CWE-1420: Exposure of Sensitive Information during Transient Execution

    CWE-1420: Exposure of Sensitive Information during Transient Execution