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Fencer Vulns
high 7.1

CVE-2017-12154 json

The prepare_vmcs02 function in arch/x86/kvm/vmx.c in the Linux kernel through 4.13.3 does not ensure that the "CR8-load exiting" and "CR8-s…

published 2017-09-26 9 y ago modified 2026-06-17 4 mo ago also EUVD-2017-3738

cvss
7.1
version 3.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.5%
EPSS 0.5% chance of exploitation in 30 days, percentile 43%
public exploits
0
none known

Summary

The prepare_vmcs02 function in arch/x86/kvm/vmx.c in the Linux kernel through 4.13.3 does not ensure that the "CR8-load exiting" and "CR8-store exiting" L0 vmcs02 controls exist in cases where L1 omits the "use TPR shadow" vmcs12 control, which allows KVM L2 guest OS users to obtain read and write access to the hardware CR8 register.

Patch / fix

  • linux Debian 14, Debian 13, Debian 12 4.12.13-1

debian advisories DEBIAN-CVE-2017-12154

  • linux Ubuntu 14.04 LTS 3.13.0-153.203
  • linux Ubuntu 16.04 LTS 4.4.0-98.121
  • linux-aws Ubuntu 16.04 LTS 4.4.0-1039.48
  • linux-gcp Ubuntu 16.04 LTS 4.13.0-1002.5
  • linux-gke Ubuntu 16.04 LTS 4.4.0-1033.33
  • linux-hwe Ubuntu 16.04 LTS 4.13.0-32.35~16.04.1
  • linux-kvm Ubuntu 16.04 LTS 4.4.0-1009.14
  • linux-azure Ubuntu 16.04 LTS 4.13.0-1005.7

ubuntu advisories UBUNTU-CVE-2017-12154

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 7 3.10.0-862.el7
  • perf RHEL 7 3.10.0-862.el7
  • python-perf RHEL 7 3.10.0-862.el7
  • kernel-kdump RHEL 7 3.10.0-862.el7
  • kernel-tools RHEL 7 3.10.0-862.el7
  • kernel-tools-libs RHEL 7 3.10.0-862.el7
  • kernel-bootwrapper RHEL 7 3.10.0-862.el7
  • kernel-abi-whitelists RHEL 7 3.10.0-862.el7

red hat advisories RHSA-2018:1062RHSA-2019:1946RHSA-2018:0676

  • kernel-rt SLE Real Time 12 SP2 4.4.88-18.1
  • kernel-syms-rt SLE Real Time 12 SP2 4.4.88-18.1
  • kernel-rt_debug SLE Real Time 12 SP2 4.4.88-18.1
  • kernel-source-rt SLE Real Time 12 SP2 4.4.88-18.1
  • kernel-ec2 SLE Module for Public Cloud 12 3.12.61-52.101.1
  • kernel-ec2 SLE Module for Public Cloud 12 3.12.74-60.64.63.1
  • kernel-xen SLES for SAP 12 SP1, SLES 12 SP1-LTSS, OpenStack Cloud 6 3.12.74-60.64.63.1
  • kernel-syms SLES for SAP 12 SP1, SLES 12 SP1-LTSS, OpenStack Cloud 6 3.12.74-60.64.63.1

suse advisories SUSE-SU-2017:2956-1SUSE-SU-2017:2920-1SUSE-SU-2017:2908-1SUSE-SU-2017:2869-1SUSE-SU-2017:2847-1

  • linux Arch Linux 4.13.5-1

arch linux advisories AVG-417

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-2017-12154 updated cvss 5.8

Kernel: kvm: nVMX: L2 guest could access hardware(L0) CR8 register

  • Red Hat Enterprise Linux Client (v. 7) perf 3.10.0-862.el7, kernel 3.10.0-862.el7, python-perf 3.10.0-862.el7, kernel-tools 3.10.0-862.el7, kernel-tools-libs 3.10.0-862.el7, kernel-abi-whitelists 3.10.0-862.el7, +1 more Red Hat Enterprise Linux Client Optional (v. 7) kernel-debuginfo-common-x86_64 3.10.0-862.el7 Red Hat Enterprise Linux ComputeNode (v. 7) perf 3.10.0-862.el7, kernel 3.10.0-862.el7, python-perf 3.10.0-862.el7, kernel-tools 3.10.0-862.el7, kernel-tools-libs 3.10.0-862.el7, kernel-abi-whitelists 3.10.0-862.el7, +1 more
    fixed: vendor fix RHSA-2018:1062
  • Red Hat Enterprise Linux ComputeNode EUS (v. 7.4) perf 3.10.0-693.55.1.el7, kernel 3.10.0-693.55.1.el7, python-perf 3.10.0-693.55.1.el7, kernel-tools 3.10.0-693.55.1.el7, kernel-tools-libs 3.10.0-693.55.1.el7, kernel-abi-whitelists 3.10.0-693.55.1.el7, +1 more
    fixed: vendor fix RHSA-2019:1946
  • Red Hat Enterprise Linux ComputeNode Optional (v. 7) kernel-debuginfo-common-x86_64 3.10.0-862.el7
    fixed: vendor fix RHSA-2018:1062
  • Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.4) kernel-debuginfo-common-x86_64 3.10.0-693.55.1.el7
    fixed: vendor fix RHSA-2019:1946
  • Red Hat Enterprise Linux for Real Time (v. 7) kernel-rt 3.10.0-862.rt56.804.el7, kernel-rt-trace 3.10.0-862.rt56.804.el7, kernel-rt-debuginfo-common-x86_64 3.10.0-862.rt56.804.el7 Red Hat Enterprise Linux for Real Time for NFV (v. 7) kernel-rt 3.10.0-862.rt56.804.el7, kernel-rt-kvm 3.10.0-862.rt56.804.el7, kernel-rt-trace 3.10.0-862.rt56.804.el7, kernel-rt-debug-kvm 3.10.0-862.rt56.804.el7, kernel-rt-trace-kvm 3.10.0-862.rt56.804.el7, kernel-rt-debuginfo-common-x86_64 3.10.0-862.rt56.804.el7
    fixed: vendor fix RHSA-2018:0676
  • Red Hat Enterprise Linux Server (v. 7) perf 3.10.0-862.el7, kernel 3.10.0-862.el7, python-perf 3.10.0-862.el7, kernel-kdump 3.10.0-862.el7, kernel-tools 3.10.0-862.el7, kernel-tools-libs 3.10.0-862.el7, +6 more
    fixed: vendor fix RHSA-2018:1062
  • Red Hat Enterprise Linux Server EUS (v. 7.4) perf 3.10.0-693.55.1.el7, kernel 3.10.0-693.55.1.el7, python-perf 3.10.0-693.55.1.el7, kernel-kdump 3.10.0-693.55.1.el7, kernel-tools 3.10.0-693.55.1.el7, kernel-tools-libs 3.10.0-693.55.1.el7, +6 more
    fixed: vendor fix RHSA-2019:1946
  • Red Hat Enterprise Linux Server Optional (v. 7) kernel-debuginfo-common-ppc64 3.10.0-862.el7, kernel-debuginfo-common-x86_64 3.10.0-862.el7, kernel-debuginfo-common-ppc64le 3.10.0-862.el7
    fixed: vendor fix RHSA-2018:1062
show 3 more
  • Red Hat Enterprise Linux Server Optional EUS (v. 7.4) kernel-debuginfo-common-ppc64 3.10.0-693.55.1.el7, kernel-debuginfo-common-x86_64 3.10.0-693.55.1.el7, kernel-debuginfo-common-ppc64le 3.10.0-693.55.1.el7
    fixed: vendor fix RHSA-2019:1946
  • Red Hat Enterprise Linux Workstation (v. 7) perf 3.10.0-862.el7, kernel 3.10.0-862.el7, python-perf 3.10.0-862.el7, kernel-tools 3.10.0-862.el7, kernel-tools-libs 3.10.0-862.el7, kernel-abi-whitelists 3.10.0-862.el7, +1 more Red Hat Enterprise Linux Workstation Optional (v. 7) kernel-debuginfo-common-x86_64 3.10.0-862.el7
    fixed: vendor fix RHSA-2018:1062
  • 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, python-perf, kernel-kdump, kernel-tools, kernel-tools-libs, +2 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

0.51% chance of exploitation in the next 30 days, higher than 43% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 3.0 7.1 CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
NVD 2.0 3.6 AV:L/AC:L/Au:N/C:P/I:P/A:N

Affected products

  • n/a Linux kernel through 4.13.3

Classification

Technology feeds

References

Sources

Fencer Vulns 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.