CVE-2018-12126

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Summary

CVECVE-2018-12126
StatePUBLISHED
Assignerintel
Source PriorityCVE Program / NVD first with legacy fallback
Published2019-05-30 16:29:00 UTC
Updated2026-05-29 21:16:31 UTC
DescriptionMicroarchitectural 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

Risk And Classification

Primary CVSS: v3.1 5.6 MEDIUM from ADP

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

EPSS: 0.005150000 probability, percentile 0.669220000 (date 2026-06-01)

Problem Types: CWE-200 | Information Disclosure | CWE-200 CWE-200 Exposure of Sensitive Information to an Unauthorized Actor

VersionSourceTypeScoreSeverityVector
3.1ADPDECLARED5.6MEDIUMCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N
3.1134c704f-9b21-4f2e-91b3-4a467353bcc0Secondary5.6MEDIUMCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N
3.0[email protected]Primary5.6MEDIUMCVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N
2.0[email protected]Primary4.7AV:L/AC:M/Au:N/C:C/I:N/A:N

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
High
Privileges Required
Low
User Interaction
None
Scope
Changed
Confidentiality
High
Integrity
None
Availability
None

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

CVSS v3.0 Breakdown

Attack Vector
Local
Attack Complexity
High
Privileges Required
Low
User Interaction
None
Scope
Changed
Confidentiality
High
Integrity
None
Availability
None

CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N

CVSS v2.0 Breakdown

Access Vector
Local
Access Complexity
Medium
Authentication
None
Confidentiality
Complete
Integrity
None
Availability
None

AV:L/AC:M/Au:N/C:C/I:N/A:N

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Fedoraproject Fedora 29 All All All
Hardware Intel Microarchitectural Store Buffer Data Sampling - All All All
Operating System Intel Microarchitectural Store Buffer Data Sampling Firmware - All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA 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.pdf Not specified

References

ReferenceSourceLinkTags
Bugtraq: [SECURITY] [DSA 4602-1] xen security update af854a3a-2127-422b-91ae-364da2661108 seclists.org
[security-announce] openSUSE-SU-2019:1806-1: important: Security update af854a3a-2127-422b-91ae-364da2661108 lists.opensuse.org
INTEL-SA-00233 af854a3a-2127-422b-91ae-364da2661108 www.intel.com Vendor Advisory
www.freebsd.org/security/advisories/FreeBSD-SA-19:07.mds.asc af854a3a-2127-422b-91ae-364da2661108 www.freebsd.org
cert-portal.siemens.com/productcert/pdf/ssa-608355.pdf af854a3a-2127-422b-91ae-364da2661108 cert-portal.siemens.com
cert-portal.siemens.com/productcert/pdf/ssa-616472.pdf af854a3a-2127-422b-91ae-364da2661108 cert-portal.siemens.com
Xen: Multiple vulnerabilities (GLSA 202003-56) — Gentoo security af854a3a-2127-422b-91ae-364da2661108 security.gentoo.org
Red Hat Customer Portal af854a3a-2127-422b-91ae-364da2661108 access.redhat.com
[SECURITY] [DLA 1789-2] intel-microcode security update af854a3a-2127-422b-91ae-364da2661108 lists.debian.org
security.FreeBSD.org/advisories/FreeBSD-SA-19:26.mcu.asc af854a3a-2127-422b-91ae-364da2661108 security.FreeBSD.org
[SECURITY] Fedora 29 Update: xen-4.11.1-5.fc29 - package-announce - Fedora Mailing-Lists af854a3a-2127-422b-91ae-364da2661108 lists.fedoraproject.org
Bugtraq: [SECURITY] [DSA 4447-2] intel-microcode security update af854a3a-2127-422b-91ae-364da2661108 seclists.org
Debian -- Security Information -- DSA-4602-1 xen af854a3a-2127-422b-91ae-364da2661108 www.debian.org
Security Advisory - Intel Microarchitectural Data Sampling (MDS) vulnerabilities af854a3a-2127-422b-91ae-364da2661108 www.huawei.com
Red Hat Customer Portal af854a3a-2127-422b-91ae-364da2661108 access.redhat.com
Bugtraq: [SECURITY] [DSA 4564-1] linux security update af854a3a-2127-422b-91ae-364da2661108 seclists.org
McAfee Security Bulletin - Updates for Intel®​ "ZombieLoad" microprocessor data leakage flaws (CVE-2018-12126, CVE-2018-12127, CVE-2018-12130, and CVE-2019-11091) af854a3a-2127-422b-91ae-364da2661108 kc.mcafee.com
[security-announce] openSUSE-SU-2019:1505-1: important: Security update af854a3a-2127-422b-91ae-364da2661108 lists.opensuse.org
Bugtraq: [SECURITY] [DSA 4469-1] libvirt security update af854a3a-2127-422b-91ae-364da2661108 seclists.org
USN-3977-3: Intel Microcode update | Ubuntu security notices af854a3a-2127-422b-91ae-364da2661108 usn.ubuntu.com
Synology Inc. af854a3a-2127-422b-91ae-364da2661108 www.synology.com
www.arubanetworks.com/assets/alert/ARUBA-PSA-2019-003.txt af854a3a-2127-422b-91ae-364da2661108 www.arubanetworks.com
Bugtraq: FreeBSD Security Advisory FreeBSD-SA-19:26.mcu af854a3a-2127-422b-91ae-364da2661108 seclists.org
[security-announce] openSUSE-SU-2019:1805-1: important: Security update af854a3a-2127-422b-91ae-364da2661108 lists.opensuse.org
FreeBSD Security Advisory - FreeBSD-SA-19:26.mcu ≈ Packet Storm af854a3a-2127-422b-91ae-364da2661108 packetstormsecurity.com
[SECURITY] Fedora 29 Update: xen-4.11.1-5.fc29 - package-announce - Fedora Mailing-Lists MITRE lists.fedoraproject.org
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Legacy QID Mappings

  • 296079 Oracle Solaris 11.4 Support Repository Update (SRU) 15.5.0 Missing (CPUOCT2019)
  • 377003 Alibaba Cloud Linux Security Update for qemu-kvm (ALINUX2-SA-2019:0030)
  • 377032 Alibaba Cloud Linux Security Update for libvirt (ALINUX2-SA-2019:0032)
  • 378146 Virtuozzo Linux Security Update for libvirt-lock-sanlock (VZLSA-2019:1180)
  • 378208 Virtuozzo Linux Security Update for qemu-guest-agent (VZLSA-2019:1181)
  • 500752 Alpine Linux Security Update for xen
  • 501186 Alpine Linux Security Update for intel-ucode
  • 501187 Alpine Linux Security Update for intel-ucode
  • 501189 Alpine Linux Security Update for intel-ucode
  • 504010 Alpine Linux Security Update for intel-ucode
  • 504011 Alpine Linux Security Update for intel-ucode
  • 504013 Alpine Linux Security Update for intel-ucode
  • 504529 Alpine Linux Security Update for xen
  • 590937 Siemens SIMATIC WinAC RTX (F) 2010 Multiple Vulnerabilities (ssa-608355)
  • 591420 Siemens ZombieLoad and Microarchitectural Data Sampling Vulnerabilities (SSA-616472)
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