CVE-2018-12126

Name: CVE-2018-12126
Creator: NVD / NIST
Published: 2019-05-30T16:29:00.87+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.6/10EPSS 1.51%

Last modified Jun 17, 2026

CVE-2018-12126 is a medium-severity vulnerability rated 5.6/10 on the CVSS scale. Microarchitectural Store Buffer Data Sampling (MSBDS): Store buffers on some microprocessors utilizing speculative execution may allow an authenticated user to potentially enable information disclosure via a side channel with local access. A list of impacted products can be found here: https://www.intel.com/content/dam/www/public/us/en/documents/corporate-information/SA00233-microcode-update-guidance_05132019.pdf. EPSS estimates a 1.51% chance of exploitation in the next 30 days.

Description

Microarchitectural Store Buffer Data Sampling (MSBDS): Store buffers on some microprocessors utilizing speculative execution may allow an authenticated user to potentially enable information disclosure via a side channel with local access. A list of impacted products can be found here: https://www.intel.com/content/dam/www/public/us/en/documents/corporate-information/SA00233-microcode-update-guidance_05132019.pdf

Metrics

CVSS 3.1

5.6/10

CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N

EPSS Probability

1.51%

71.2th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Intel	Microarchitectural Store Buffer Data Sampling Firmware	All versions
Fedoraproject	Fedora	29

References

Timeline

Published: May 30, 2019
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2018-12126?

How severe is CVE-2018-12126?

CVE-2018-12126 has a CVSS score of 5.6/10 (MEDIUM severity). The EPSS model estimates a 1.51% probability of exploitation in the next 30 days.

How do I fix CVE-2018-12126?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2018-12126?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST