CVE-2019-11091

21

FAUCET Score

CVE-2019-11091, also known as Microarchitectural Data Sampling Uncacheable Memory (MDSUM), is a side-channel vulnerability affecting certain Intel microprocessors utilizing speculative execution, including various Fedora and Intel products. It allows an authenticated local user to potentially disclose sensitive information. With a CVSS score of 5.6 (MEDIUM), exploitation requires local access and high attack complexity, but can lead to significant information disclosure. There is no public exploit code available (Metasploit, Nuclei, ExploitDB), and it is not listed in CISA's KEV catalog, indicating no active exploitation. However, it has garnered significant community discussion and media coverage, suggesting awareness of its potential impact.

Impacted Technologies

Vendor	Product	Version(s)	CPE
		Range not provided by sourceCPE matchmatch criteria	cpe:2.3:o:intel:microarchitectural_data_sampling_uncacheable_memory_firmware:-:::::::*
		29CPE matchmatch criteria	cpe:2.3:o:fedoraproject:fedora:29:::::::*

CVSS Data

CVSS version used by this source: 3.0

5.6MEDIUM

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

Attack Vector

LOCAL

Attack Complexity

HIGH

Privileges Required

LOW

User Interaction

NONE

Scope

CHANGED

Confidentiality Impact

HIGH

Integrity Impact

NONE

Availability Impact

NONE

Exploitability Score

1.1

Impact Score

4.0

CvssVersion

3.0

Exploit Intelligence

EPSS Score

0.61%

Probability of exploitation in next 30 days

EPSS Percentile

45.7%

Percentile rank of EPSS score among Peer Group

As of 2026-07-24

Model: v2026.06.15

This CVE's current EPSS score of 0.0061 is in the 88th percentile among its peer group of 1,296 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.4 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (60)

redhatpatch availablevia redhat_api

Product: Red Hat OpenStack Platform 9.0 (Mitaka)Fixed in: qemu-kvm-rhev-10:2.12.0-18.el7_6.5

redhatpatch availablevia redhat_api

Product: Red Hat Enterprise Linux 6Fixed in: libvirt-0:0.10.2-64.el6_10.1

redhatpatch availablevia redhat_api

Product: Red Hat Enterprise Linux 6Fixed in: qemu-kvm-2:0.12.1.2-2.506.el6_10.3

redhatpatch availablevia redhat_api

Product: Red Hat Enterprise Linux 6.5 Advanced Update SupportFixed in: kernel-0:2.6.32-431.94.2.el6

redhatpatch availablevia redhat_api

Product: Red Hat Enterprise Linux 6.5 Advanced Update SupportFixed in: libvirt-0:0.10.2-29.el6_5.18

redhatpatch availablevia redhat_api

Product: Red Hat Enterprise Linux 6.5 Advanced Update SupportFixed in: qemu-kvm-2:0.12.1.2-2.415.el6_5.20

redhatpatch availablevia redhat_api

Product: Red Hat Enterprise Linux 6.6 Advanced Update SupportFixed in: kernel-0:2.6.32-504.78.2.el6

redhatpatch availablevia redhat_api

Product: Red Hat Enterprise Linux 6.6 Advanced Update SupportFixed in: libvirt-0:0.10.2-46.el6_6.10

redhatpatch availablevia redhat_api

Product: Red Hat Enterprise Linux 6.6 Advanced Update SupportFixed in: qemu-kvm-2:0.12.1.2-2.448.el6_6.8

redhatpatch availablevia redhat_api

Product: Red Hat Enterprise Linux 7Fixed in: kernel-rt-0:3.10.0-957.12.2.rt56.929.el7

redhatpatch availablevia redhat_api

Product: Red Hat Enterprise Linux 7Fixed in: kernel-0:3.10.0-957.12.2.el7

redhatpatch availablevia redhat_api

Product: Red Hat Enterprise Linux 7Fixed in: libvirt-0:4.5.0-10.el7_6.9

redhatpatch availablevia redhat_api

Product: Red Hat Enterprise Linux 7Fixed in: qemu-kvm-10:1.5.3-160.el7_6.2

redhatpatch availablevia redhat_api

Product: Red Hat Enterprise Linux 7.2 Advanced Update SupportFixed in: kernel-0:3.10.0-327.78.2.el7

redhatpatch availablevia redhat_api

Product: Red Hat Enterprise Linux 7.2 Advanced Update SupportFixed in: libvirt-0:1.2.17-13.el7_2.10

redhatpatch availablevia redhat_api

Product: Red Hat Enterprise Linux 7.2 Advanced Update SupportFixed in: qemu-kvm-10:1.5.3-105.el7_2.19

redhatpatch availablevia redhat_api

Product: Red Hat Enterprise Linux 7.2 Telco Extended Update SupportFixed in: kernel-0:3.10.0-327.78.2.el7

redhatpatch availablevia redhat_api

Product: Red Hat Enterprise Linux 7.2 Telco Extended Update SupportFixed in: libvirt-0:1.2.17-13.el7_2.10

redhatpatch availablevia redhat_api

Product: Red Hat Enterprise Linux 7.2 Telco Extended Update SupportFixed in: qemu-kvm-10:1.5.3-105.el7_2.19

redhatpatch availablevia redhat_api

Product: Red Hat Enterprise Linux 7.2 Update Services for SAP SolutionsFixed in: kernel-0:3.10.0-327.78.2.el7

redhatpatch availablevia redhat_api

Product: Red Hat Enterprise Linux 7.2 Update Services for SAP SolutionsFixed in: libvirt-0:1.2.17-13.el7_2.10

redhatpatch availablevia redhat_api

Product: Red Hat Enterprise Linux 7.2 Update Services for SAP SolutionsFixed in: qemu-kvm-10:1.5.3-105.el7_2.19

redhatpatch availablevia redhat_api

Product: Red Hat Enterprise Linux 7.3 Advanced Update SupportFixed in: kernel-0:3.10.0-514.64.2.el7

redhatpatch availablevia redhat_api

Product: Red Hat Enterprise Linux 7.3 Advanced Update SupportFixed in: libvirt-0:2.0.0-10.el7_3.14

redhatpatch availablevia redhat_api

Product: Red Hat Enterprise Linux 7.3 Advanced Update SupportFixed in: qemu-kvm-10:1.5.3-126.el7_3.17

redhatpatch availablevia redhat_api

Product: Red Hat Enterprise Linux 7.3 Telco Extended Update SupportFixed in: kernel-0:3.10.0-514.64.2.el7

redhatpatch availablevia redhat_api

Product: Red Hat Enterprise Linux 7.3 Telco Extended Update SupportFixed in: libvirt-0:2.0.0-10.el7_3.14

redhatpatch availablevia redhat_api

Product: Red Hat Enterprise Linux 7.3 Telco Extended Update SupportFixed in: qemu-kvm-10:1.5.3-126.el7_3.17

redhatpatch availablevia redhat_api

Product: Red Hat Enterprise Linux 7.3 Update Services for SAP SolutionsFixed in: kernel-0:3.10.0-514.64.2.el7

redhatpatch availablevia redhat_api

Product: Red Hat Enterprise Linux 7.3 Update Services for SAP SolutionsFixed in: libvirt-0:2.0.0-10.el7_3.14

redhatpatch availablevia redhat_api

Product: Red Hat Enterprise Linux 7.3 Update Services for SAP SolutionsFixed in: qemu-kvm-10:1.5.3-126.el7_3.17

redhatpatch availablevia redhat_api

Product: Red Hat Enterprise Linux 7.4 Extended Update SupportFixed in: kernel-0:3.10.0-693.47.2.el7

redhatpatch availablevia redhat_api

Product: Red Hat Enterprise Linux 7.4 Extended Update SupportFixed in: libvirt-0:3.2.0-14.el7_4.13

redhatpatch availablevia redhat_api

Product: Red Hat Enterprise Linux 7.4 Extended Update SupportFixed in: qemu-kvm-10:1.5.3-141.el7_4.10

redhatpatch availablevia redhat_api

Product: Red Hat Enterprise Linux 7.5 Extended Update SupportFixed in: kernel-0:3.10.0-862.32.2.el7

redhatpatch availablevia redhat_api

Product: Red Hat Enterprise Linux 7.5 Extended Update SupportFixed in: libvirt-0:3.9.0-14.el7_5.9

redhatpatch availablevia redhat_api

Product: Red Hat Enterprise Linux 7.5 Extended Update SupportFixed in: qemu-kvm-10:1.5.3-156.el7_5.7

redhatpatch availablevia redhat_api

Product: Red Hat Enterprise Linux 8Fixed in: virt:rhel-8000020190510171727.55190bc5

redhatpatch availablevia redhat_api

Product: Red Hat Enterprise Linux 8Fixed in: kernel-rt-0:4.18.0-80.1.2.rt9.145.el8_0

redhatpatch availablevia redhat_api

Product: Red Hat Enterprise Linux 8Fixed in: kernel-0:4.18.0-80.1.2.el8_0

redhatpatch availablevia redhat_api

Product: Red Hat Enterprise Linux 8 Advanced VirtualizationFixed in: virt:8.0.0-8000020190530233731.55190bc5

redhatpatch availablevia redhat_api

Product: Red Hat Enterprise MRG 2Fixed in: kernel-rt-1:3.10.0-693.47.2.rt56.641.el6rt

redhatpatch availablevia redhat_api

Product: Red Hat OpenStack Platform 10.0 (Newton)Fixed in: qemu-kvm-rhev-10:2.12.0-18.el7_6.5

redhatpatch availablevia redhat_api

Product: Red Hat OpenStack Platform 13.0 (Queens)Fixed in: qemu-kvm-rhev-10:2.12.0-18.el7_6.5

redhatpatch availablevia redhat_api

Product: Red Hat OpenStack Platform 14.0 (Rocky)Fixed in: qemu-kvm-rhev-10:2.12.0-18.el7_6.5

redhatpatch availablevia redhat_api

Product: Red Hat Enterprise Linux 6Fixed in: kernel-0:2.6.32-754.14.2.el6

redhatpatch availablevia redhat_api

Product: Red Hat Virtualization 4.2 for Red Hat Enterprise Linux 7.6 EUSFixed in: vdsm-0:4.20.49-1.el7ev

redhatpatch availablevia redhat_api

Product: Red Hat Virtualization 4.2 for Red Hat Enterprise Linux 7.6 EUSFixed in: redhat-release-virtualization-host-0:4.2-8.6.el7

redhatpatch availablevia redhat_api

Product: Red Hat Virtualization 4.2 for Red Hat Enterprise Linux 7.6 EUSFixed in: redhat-virtualization-host-0:4.2-20190512.0.el7_6

redhatpatch availablevia redhat_api

Product: Red Hat Virtualization 4 for Red Hat Enterprise Linux 7Fixed in: qemu-kvm-rhev-10:2.12.0-18.el7_6.5

redhatpatch availablevia redhat_api

Product: Red Hat Virtualization 4 for Red Hat Enterprise Linux 7Fixed in: vdsm-0:4.30.13-4.el7ev

redhatpatch availablevia redhat_api

Product: Red Hat Virtualization 4 for Red Hat Enterprise Linux 7Fixed in: redhat-release-virtualization-host-0:4.3-0.7.el7

redhatpatch availablevia redhat_api

Product: Red Hat Virtualization 4 for Red Hat Enterprise Linux 7Fixed in: redhat-virtualization-host-0:4.3-20190512.0.el7_6

redhatpatch availablevia redhat_api

Product: Red Hat Virtualization 4 for Red Hat Enterprise Linux 7Fixed in: rhvm-appliance-0:4.3-20190506.0.el7

redhatpatch availablevia redhat_api

Product: Red Hat Virtualization 4 for Red Hat Enterprise Linux 7Fixed in: qemu-kvm-rhev-10:2.12.0-33.el7

redhatpatch availablevia redhat_api

Product: Red Hat Virtualization Engine 4.2Fixed in: rhvm-setup-plugins-0:4.2.14-1.el7ev

redhatpatch availablevia redhat_api

Product: Red Hat Virtualization Engine 4.3Fixed in: rhvm-setup-plugins-0:4.3.1-1.el7ev

redhatpatch availablevia redhat_api

Product: Red Hat Virtualization Engine 4.3Fixed in: qemu-kvm-rhev-10:2.12.0-33.el7

redhatno patchvia redhat_api

Product: Red Hat Virtualization 4Fixed in: ovirt-guest-agent

redhatend of lifevia redhat_api

Product: Red Hat Enterprise Linux 5Fixed in: kernel

Vendor Advisories (1)

redhatCVE-2019-11091Moderate

hardware: Microarchitectural Data Sampling Uncacheable Memory (MDSUM)

References

lists.opensuse.org / opensuse-security-announce/2019-06/msg00014.html

lists.opensuse.org / opensuse-security-announce/2019-07/msg00052.html

lists.opensuse.org / opensuse-security-announce/2019-07/msg00053.html

access.redhat.com / errata/RHSA-2019:1455

access.redhat.com / errata/RHSA-2019:2553

cert-portal.siemens.com / productcert/pdf/ssa-608355.pdf

cert-portal.siemens.com / productcert/pdf/ssa-616472.pdf

kc.mcafee.com / corporate/index

lists.debian.org / debian-lts-announce/2019/06/msg00018.html

lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/OH73SGTJ575OBCPSJFX6LX7KP2KZIEN4

seclists.org / bugtraq/2019/Jun/28

seclists.org / bugtraq/2019/Jun/36

seclists.org / bugtraq/2019/Nov/15

seclists.org / bugtraq/2020/Jan/21

security.gentoo.org / glsa/202003-56

usn.ubuntu.com / 3977-3

debian.org / security/2020/dsa-4602

freebsd.org / security/advisories/FreeBSD-SA-19:07.mds.asc

intel.com / content/www/us/en/security-center/advisory/intel-sa-00233.html

Vendor Advisory

synology.com / security/advisory/Synology_SA_19_24

arubanetworks.com / assets/alert/ARUBA-PSA-2019-003.txt

huawei.com / en/psirt/security-advisories/huawei-sa-20190712-01-mds-en