Skip to content
Fencer Intel
medium 6.7

CVE-2019-3887 json

A flaw was found in the way KVM hypervisor handled x2APIC Machine Specific Rregister (MSR) access with nested(=1) virtualization enabled.

published 7y ago modified 4mo ago also EUVD-2019-13497

cvss
6.7
version 3.0, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.4%
EPSS 0.4% chance of exploitation in 30 days, percentile 29%
public exploits
0
none known

Summary

A flaw was found in the way KVM hypervisor handled x2APIC Machine Specific Rregister (MSR) access with nested(=1) virtualization enabled. In that, L1 guest could access L0's APIC register values via L2 guest, when 'virtualize x2APIC mode' is enabled. A guest could use this flaw to potentially crash the host kernel resulting in DoS issue. Kernel versions from 4.16 and newer are vulnerable to this issue.

Patch / fix

  • linux Debian 14, Debian 13, Debian 12 4.19.37-1

debian advisories DEBIAN-CVE-2019-3887

  • linux-hwe Ubuntu 18.04 LTS 4.18.0-20.21~18.04.1
  • linux-azure Ubuntu 18.04 LTS 4.18.0-1018.18~18.04.1
  • linux-gcp-edge Ubuntu 18.04 LTS 4.18.0-1011.12~18.04.1

ubuntu advisories UBUNTU-CVE-2019-3887

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • kernel RHEL 8 4.18.0-80.11.1.el8_0
  • perf RHEL 8 4.18.0-80.11.1.el8_0
  • bpftool RHEL 8 4.18.0-80.11.1.el8_0
  • kernel-core RHEL 8 4.18.0-80.11.1.el8_0
  • kernel-tools RHEL 8 4.18.0-80.11.1.el8_0
  • python3-perf RHEL 8 4.18.0-80.11.1.el8_0
  • kernel-modules RHEL 8 4.18.0-80.11.1.el8_0
  • kernel-zfcpdump RHEL 8 4.18.0-80.11.1.el8_0

red hat advisories RHSA-2019:2703RHSA-2019:2741

  • kernel-source openSUSE Tumbleweed 5.14.6-1.4
  • kernel-source openSUSE Tumbleweed 6.6.17-1.1

opensuse advisories openSUSE-SU-2024:10728-1openSUSE-SU-2024:13704-1

  • kernel Azure Linux 3.0 6.6.35.1-4
  • kernel CBL-Mariner 2.0 5.10.78.1-1

azure linux advisories AZL-34854AZL-6521

Azure Linux vulnerability data, Copyright (c) Microsoft Corporation, from https://github.com/microsoft/AzureLinuxVulnerabilityData via OSV, under the MIT licence; changed: normalised to fixed package versions per release. MIT

Is CVE-2019-3887 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

Check with Fencer

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2019-3887 updated cvss 6.7

Kernel: KVM: nVMX: guest accesses L0 MSR causes potential DoS

  • Red Hat CodeReady Linux Builder (v. 8) kernel-debuginfo-common-x86_64 4.18.0-80.11.1.el8_0, kernel-debuginfo-common-aarch64 4.18.0-80.11.1.el8_0, kernel-debuginfo-common-ppc64le 4.18.0-80.11.1.el8_0 Red Hat Enterprise Linux BaseOS (v. 8) perf 4.18.0-80.11.1.el8_0, kernel 4.18.0-80.11.1.el8_0, bpftool 4.18.0-80.11.1.el8_0, kernel-core 4.18.0-80.11.1.el8_0, kernel-tools 4.18.0-80.11.1.el8_0, python3-perf 4.18.0-80.11.1.el8_0, +15 more
    fixed: vendor fix RHSA-2019:2703
  • Red Hat Enterprise Linux Real Time (v. 8) kernel-rt 4.18.0-80.11.1.rt9.156.el8_0, kernel-rt-core 4.18.0-80.11.1.rt9.156.el8_0, kernel-rt-modules 4.18.0-80.11.1.rt9.156.el8_0, kernel-rt-debug-core 4.18.0-80.11.1.rt9.156.el8_0, kernel-rt-debug-modules 4.18.0-80.11.1.rt9.156.el8_0, kernel-rt-modules-extra 4.18.0-80.11.1.rt9.156.el8_0, +2 more Red Hat Enterprise Linux Real Time for NFV (v. 8) kernel-rt 4.18.0-80.11.1.rt9.156.el8_0, kernel-rt-kvm 4.18.0-80.11.1.rt9.156.el8_0, kernel-rt-core 4.18.0-80.11.1.rt9.156.el8_0, kernel-rt-modules 4.18.0-80.11.1.rt9.156.el8_0, kernel-rt-debug-kvm 4.18.0-80.11.1.rt9.156.el8_0, kernel-rt-debug-core 4.18.0-80.11.1.rt9.156.el8_0, +4 more
    fixed: vendor fix RHSA-2019:2741
  • Red Hat Enterprise Linux 5 kernel Red Hat Enterprise Linux 6 perf, kernel, python-perf, kernel-kdump, kernel-firmware, kernel-bootwrapper, +1 more Red Hat Enterprise Linux 7 perf, kernel, bpftool, kernel-rt, kernel-alt, python-perf, +9 more Red Hat Enterprise MRG 2 kernel-rt, mrg-rt-release, kernel-rt-trace, kernel-rt-vanilla, kernel-rt-firmware
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

0.36% chance of exploitation in the next 30 days, higher than 29% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
CNA 3.0 6.7 CVSS:3.0/AV:L/AC:H/PR:H/UI:N/S:C/C:L/I:L/A:H
NVD 3.1 5.6 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:N/I:N/A:H
NVD 2.0 4.7 AV:L/AC:M/Au:N/C:N/I:N/A:C

Affected products

  • The Linux Foundation Kernel

Classification

Weakness
Technology feeds

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.