01 Record

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

MediumPUBLISHEDCNA: intel

CNA base score5.6 CVSS v3.xCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N

View raw JSON

02 Description

Microarchitectural Store Buffer Data Sampling (MSBDS): Store buffers on some microprocessors utilizing speculative execution may allow an authenticated user to potentially enable information

03 Exploitation and scoring

Exploitation

Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.

SSVC decision

ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

1.51% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 72.6% of scored records. A rank, not a probability.

NVD base score

5.6 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

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

NVD analysis status

Modified. NVD last modified this record on 2026-06-17.

Red Hat severity

Moderate. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published

2019-05-30 15:36Z7 YR AGO

Last updated

2026-05-29 20:09Z3 MO AGO

Reserved

2018-06-11

Assigning CNA

intel

Record state

PUBLISHED

Severity

Medium (CVSS 5.6)

CNA CVSS vector

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

Weaknesses

CWE-200Exposure of Sensitive Information to an Unauthorized ActorClass
CWE-515Covert Storage ChannelBase

Data version

5.2

Document digest

e9a3beb141e44e2b890f2061a45596f8df075c9a3a897ce3434775c1fa0dee2e

05 Affected products

VendorProductVersionsPlatforms

Intel CorporationCentral ProcCVE-2018-12126essing Units (CPUs)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—

06 References

www.intel.comhttps://www.intel.com/content/www/us/en/security-center/advisory/intel-sa-00233.htmlx_refsource_CONFIRM
www.synology.comhttps://www.synology.com/security/advisory/Synology_SA_19_24x_refsource_CONFIRM
lists.fedoraproject.orgFEDORA-2019-1f5832fc0ehttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/OH73SGTJ575OBCPSJFX6LX7KP2KZIEN4/vendor-advisoryx_refsource_FEDORA
lists.opensuse.orgopenSUSE-SU-2019:1505http://lists.opensuse.org/opensuse-security-announce/2019-06/msg00014.htmlvendor-advisoryx_refsource_SUSE
access.redhat.comRHSA-2019:1455https://access.redhat.com/errata/RHSA-2019:1455vendor-advisoryx_refsource_REDHAT
usn.ubuntu.comUSN-3977-3https://usn.ubuntu.com/3977-3/vendor-advisoryx_refsource_UBUNTU
lists.debian.org[debian-lts-announce] 20190620 [SECURITY] [DLA 1789-2] intel-microcode security updatehttps://lists.debian.org/debian-lts-announce/2019/06/msg00018.htmlmailing-listx_refsource_MLIST
seclists.org20190624 [SECURITY] [DSA 4447-2] intel-microcode security updatehttps://seclists.org/bugtraq/2019/Jun/28mailing-listx_refsource_BUGTRAQ
seclists.org20190624 [SECURITY] [DSA 4469-1] libvirt security updatehttps://seclists.org/bugtraq/2019/Jun/36mailing-listx_refsource_BUGTRAQ
www.arubanetworks.comhttp://www.arubanetworks.com/assets/alert/ARUBA-PSA-2019-003.txtx_refsource_CONFIRM
cert-portal.siemens.comhttps://cert-portal.siemens.com/productcert/pdf/ssa-616472.pdfx_refsource_CONFIRM
www.huawei.comhttp://www.huawei.com/en/psirt/security-advisories/huawei-sa-20190712-01-mds-enx_refsource_CONFIRM
lists.opensuse.orgopenSUSE-SU-2019:1805http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00053.htmlvendor-advisoryx_refsource_SUSE
lists.opensuse.orgopenSUSE-SU-2019:1806http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00052.htmlvendor-advisoryx_refsource_SUSE
www.freebsd.orgFreeBSD-SA-19:07https://www.freebsd.org/security/advisories/FreeBSD-SA-19:07.mds.ascvendor-advisoryx_refsource_FREEBSD
access.redhat.comRHSA-2019:2553https://access.redhat.com/errata/RHSA-2019:2553vendor-advisoryx_refsource_REDHAT
kc.mcafee.comhttps://kc.mcafee.com/corporate/index?page=content&id=SB10292x_refsource_CONFIRM
cert-portal.siemens.comhttps://cert-portal.siemens.com/productcert/pdf/ssa-608355.pdfx_refsource_CONFIRM
security.freebsd.orgFreeBSD-SA-19:26https://security.FreeBSD.org/advisories/FreeBSD-SA-19:26.mcu.ascvendor-advisoryx_refsource_FREEBSD
seclists.org20191112 FreeBSD Security Advisory FreeBSD-SA-19:26.mcuhttps://seclists.org/bugtraq/2019/Nov/16mailing-listx_refsource_BUGTRAQ
seclists.org20191112 [SECURITY] [DSA 4564-1] linux security updatehttps://seclists.org/bugtraq/2019/Nov/15mailing-listx_refsource_BUGTRAQ
packetstormsecurity.comhttp://packetstormsecurity.com/files/155281/FreeBSD-Security-Advisory-FreeBSD-SA-19-26.mcu.htmlx_refsource_MISC
www.debian.orgDSA-4602https://www.debian.org/security/2020/dsa-4602vendor-advisoryx_refsource_DEBIAN
seclists.org20200114 [SECURITY] [DSA 4602-1] xen security updatehttps://seclists.org/bugtraq/2020/Jan/21mailing-listx_refsource_BUGTRAQ
security.gentoo.orgGLSA-202003-56https://security.gentoo.org/glsa/202003-56vendor-advisoryx_refsource_GENTOO

01 Record index

CVE-2018-12126

02 Description

03 Exploitation and scoring

04 Metadata

05 Affected products

06 References

02 Records

CVE-2018-12126

02 Description

03 Exploitation and scoring

04 Metadata

05 Affected products

06 References