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

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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.

What the weakness is: CWE-1421 at MITRE. All weaknesses

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Explain CWE-1421: Exposure of Sensitive Information in Shared Microarchitectural Structures during Transient Execution and how to prevent and detect it in code. Use https://cwe.mitre.org/data/definitions/1421.html and https://cve.bz/cve/cwe/1421?via=ask-ai-copy for recent CVEs with this weakness. Cite the sources.

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