Enclave corruption and disclosure via unsanitized FPU state
Published Dec 30, 2023 · Updated Apr 17, 2025
Improper initialization in SCONE before 5.8.0 allows local users to corrupt enclave floating-point results or expose sensitive data. The __scone_entry path enters the enclave without sanitizing x87 and SSE control and state registers, leaving attacker-selected precision, rounding, exception-mask, or MMX state active. Exploitation requires local code execution on the SGX host and a victim enclave that performs susceptible floating-point operations; it can silently alter results or reveal operands through exception behavior.
Summary
What happened
Improper initialization in SCONE before 5.8.0 allows local users to corrupt enclave floating-point results or expose sensitive data. The __scone_entry path enters the enclave without sanitizing x87 and SSE control and state registers, leaving attacker-selected precision, rounding, exception-mask, or MMX state active. Exploitation requires local code execution on the SGX host and a victim enclave that performs susceptible floating-point operations; it can silently alter results or reveal operands through exception behavior.
The record
- CVE
- CVE-2022-46487
- Published
- Dec 30, 2023
- Updated
- Apr 17, 2025
- Vendor
- Unknown vendor
- Product
- Unknown product
- Classifications
- CWE-665
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Dec 30, 2023CVE publishedPublication date reported by the CVE source.
- Apr 17, 2025Record updatedLatest update available in the CVE record.
Exploitability
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What is affected?
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Published CVSS scores
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Attacks
What attackers are doing with it
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Weakness, pattern, technique
Public exploit references
- Faulty Point Unit reproducible research artifactfunctional · validated
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Technologies
Your stack
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Your stack
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