Microarchitectural Data Sampling Uncacheable Memory (MDSUM): Uncacheable memory on some microprocessors utilizing speculative execution…

Description

Microarchitectural Data Sampling Uncacheable Memory (MDSUM): Uncacheable memory 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

Scores

EPSS (exploitation in 30 days)

0.61% · top 51% of all CVEs (5 Nov 2026)

CISA SSVC

Exploitation: none · Automatable: no · Technical impact: partial

The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.6.

Weakness

• Information Disclosure
• CWE-noinfo Not enough information

Affected products

• Intel Corporation · Central Processing 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

References (22)

• https://www.intel.com/content/www/us/en/security-center/advisory/intel-sa-00233.html (opens in a new tab)x_refsource_CONFIRMx_transferred
• https://www.synology.com/security/advisory/Synology_SA_19_24 (opens in a new tab)x_refsource_CONFIRMx_transferred
• FEDORA-2019-1f5832fc0e (opens in a new tab)vendor-advisoryx_refsource_FEDORAx_transferred
• openSUSE-SU-2019:1505 (opens in a new tab)vendor-advisoryx_refsource_SUSEx_transferred
• RHSA-2019:1455 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
• USN-3977-3 (opens in a new tab)vendor-advisoryx_refsource_UBUNTUx_transferred
• [debian-lts-announce] 20190620 [SECURITY] [DLA 1789-2] intel-microcode security update (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
• 20190624 [SECURITY] [DSA 4447-2] intel-microcode security update (opens in a new tab)mailing-listx_refsource_BUGTRAQx_transferred
• 20190624 [SECURITY] [DSA 4469-1] libvirt security update (opens in a new tab)mailing-listx_refsource_BUGTRAQx_transferred
• http://www.arubanetworks.com/assets/alert/ARUBA-PSA-2019-003.txt (opens in a new tab)x_refsource_CONFIRMx_transferred
• https://cert-portal.siemens.com/productcert/pdf/ssa-616472.pdf (opens in a new tab)x_refsource_CONFIRMx_transferred
• http://www.huawei.com/en/psirt/security-advisories/huawei-sa-20190712-01-mds-en (opens in a new tab)x_refsource_CONFIRMx_transferred
• openSUSE-SU-2019:1805 (opens in a new tab)vendor-advisoryx_refsource_SUSEx_transferred
• openSUSE-SU-2019:1806 (opens in a new tab)vendor-advisoryx_refsource_SUSEx_transferred
• FreeBSD-SA-19:07 (opens in a new tab)vendor-advisoryx_refsource_FREEBSDx_transferred
• RHSA-2019:2553 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
• https://kc.mcafee.com/corporate/index?page=content&id=SB10292 (opens in a new tab)x_refsource_CONFIRMx_transferred
• https://cert-portal.siemens.com/productcert/pdf/ssa-608355.pdf (opens in a new tab)x_refsource_CONFIRMx_transferred
• 20191112 [SECURITY] [DSA 4564-1] linux security update (opens in a new tab)mailing-listx_refsource_BUGTRAQx_transferred
• DSA-4602 (opens in a new tab)vendor-advisoryx_refsource_DEBIANx_transferred
• 20200114 [SECURITY] [DSA 4602-1] xen security update (opens in a new tab)mailing-listx_refsource_BUGTRAQx_transferred
• GLSA-202003-56 (opens in a new tab)vendor-advisoryx_refsource_GENTOOx_transferred

Sources

The same CVE in the primary databases and aggregators, to check against.

• CVE.org record (opens in a new tab)
• CVE List JSON (GitHub) (opens in a new tab)
• NVD (opens in a new tab)
• FIRST EPSS (opens in a new tab)
• OSV.dev (opens in a new tab)
• GitHub Advisories (opens in a new tab)
• CIRCL Vulnerability-Lookup (opens in a new tab)

Badge for a README or a ticket

[![CVE-2019-11091](https://trackcve.app/badge/CVE-2019-11091.svg)](https://trackcve.app/cve/CVE-2019-11091)

Record last updated 28 May 2026, 18:17 UTC.