CVE-2023-40540 — Non-Transparent Sharing of Microarchitectural Resources in some Intel(R) NUC BIO

Non-Transparent Sharing of Microarchitectural Resources in some Intel(R) NUC BIOS firmware may allow a privileged user to potentially enable information disclosure via local access.

01What is this vulnerability?

Non-Transparent Sharing of Microarchitectural Resources in some Intel(R) NUC BIOS firmware may allow a privileged user to potentially enable information disclosure via local access.

02Affected products

Vendor	Product	Versions
n	a / Intel(R) NUC BIOS firmware	some Intel(R) NUC BIOS firmware

03Active exploitation status

Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.

04Recommended remediation

• Patch to a fixed version listed in the vendor advisory (see references below).
• Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
• Hunt historical logs for exploitation indicators — see Detection signatures below.

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Open the Sigma generator with a pre-filled prompt for this CVE to draft a starting detection in your stack of choice:

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07Related CVEs

No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.

08Timeline

• Published: 2023-11-14T19:05:06.268Z
• Last modified: 2024-08-30T15:16:20.978Z

09References

• www.intel.com — https://www.intel.com/content/www/us/en/security-center/advisory/intel-sa-01001.…