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No exploitation reportedFix available

CVE-2018-12126

No exploitation reported by the sources we read.

  • Published2019-05-30
  • WeaknessCWE-200

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

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

Timeline

dates in UTC
  1. 2019-05-3016:29CVE publishedNVD

Versions per branch

NVD
Fedoraproject fedora
BranchAffectedFixed in
29.x= 29no fix published
Intel microarchitectural store buffer data sampling firmwareversion to verify
BranchAffectedFixed in
—all versionsno fix published

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Products declared by the CNA1 product

As intel, the CNA that assigned this CVE, declared them in the CVE record; versions as written.

  • Intel Corporation Central ProcCVE-2018-12126essing Units (CPUs)
    Affected
    • = 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.pdfno fix stated

Source: the CNA record (CVE Program), © The MITRE Corporation,CVE Terms of UseCVE recordupdated 2020-03-26

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • hivexRed Hat:enterprise_linux:8::appstreamall versions · fixed in 0:1.3.15-6.module+el8.0.0+3075+09be6b65and 3 other packages
  • hivexRed Hat:advanced_virtualization:8::el8all versions · fixed in 0:1.3.15-6.module+el8.0.0+3273+6bc1ee54and 9 other packages
  • intel-microcodeDebian:14all versions · fixed in 3.20190514.1
  • intel-microcodeDebian:13all versions · fixed in 3.20190514.1
  • intel-microcodeDebian:12all versions · fixed in 3.20190514.1
  • intel-microcodeDebian:9all versions · fixed in 3.20190514.1~deb9u1
  • intel-microcodeDebian:8all versions · fixed in 3.20190514.1~deb8u1
  • intel-microcodeDebian:8all versions · fixed in 3.20190618.1~deb8u1

334 more package ranges on OSV.dev

Vendor advisories

  • CVE-2018-12126 Red Hat Product Security3,508 products fixed · 4 known affected

    hardware: Microarchitectural Store Buffer Data Sampling (MSBDS)

    kernel.src as a component of Red Hat Enterprise Linux 5 · ovirt-guest-agent-common as a component of Red Hat Virtualization 4 · ovirt-guest-agent-gdm-plugin as a component of Red Hat Virtualization 4 · +1 more

  • RHSA-2019:2553 Red Hat Product Security17 products fixed

    Red Hat Security Advisory: qemu-kvm-rhev security, bug fix, and enhancement update

  • RHSA-2019:1455 Red Hat Product Security644 products fixed

    Red Hat Security Advisory: Advanced Virtualization security update

  • RHSA-2019:1208 Red Hat Product Security4 products fixed

    Red Hat Security Advisory: rhvm-appliance security update

  • RHSA-2019:1209 Red Hat Product Security6 products fixed

    Red Hat Security Advisory: redhat-virtualization-host security update

  • RHSA-2019:1207 Red Hat Product Security5 products fixed

    Red Hat Security Advisory: redhat-virtualization-host security update

38 more advisories

Full record on NVD

Fix

  1. Vendor fix Red Hat Product Security RHSA-2019:2553 · 17 productsFor details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/2974891 After installing this update, shut down all running virtual machines. Once all virtual machines have shut down, start them again for this update to …
  2. Vendor fix Red Hat Product Security RHSA-2019:1455 · 644 productsFor details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258
  3. Vendor fix Red Hat Product Security RHSA-2019:1208 · 4 productsFor details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/2974891
  4. Vendor fix Red Hat Product Security RHSA-2019:1171 · 94 productsFor details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 The system must be rebooted for this update to take effect.
  5. Vendor fix Red Hat Product Security RHSA-2019:1188 · 42 productsFor details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 After installing this update, shut down all running virtual machines. Once all virtual machines have shut down, start them again for this update to ta…
  6. Vendor fix Red Hat Product Security RHSA-2019:1186 · 75 productsFor details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 After installing the updated packages, libvirtd will be restarted automatically.

Advisories and patches

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof of concept
Metasploit modules
none listed
Metasploit Framework

Sources

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N
Published
2019-05-30
Last Modified
2026-06-17
NVD status
Modified
GitHub Advisory
GHSA-443r-v97h-37x3

Frequently asked questions

What is CVE-2018-12126?

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

Is CVE-2018-12126 actively exploited?

Active exploitation of CVE-2018-12126 has not been confirmed. Its EPSS score was 1.5% on 2026-11-09, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2018-12126?

CVE-2018-12126 has a CVSS v3 base score of 5.6 (MEDIUM severity), with vector string CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N.

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