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Fencer Intel
low 3.3

CVE-2014-8134 json

The paravirt_ops_setup function in arch/x86/kernel/kvm.c in the Linux kernel through 3.18 uses an improper paravirt_enabled setting for KVM…

published 2014-12-12 11 y ago modified 2026-06-17 4 mo ago also EUVD-2014-7977

cvss
3.3
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.7%
EPSS 0.7% chance of exploitation in 30 days, percentile 53%
public exploits
0
none known

Summary

The paravirt_ops_setup function in arch/x86/kernel/kvm.c in the Linux kernel through 3.18 uses an improper paravirt_enabled setting for KVM guest kernels, which makes it easier for guest OS users to bypass the ASLR protection mechanism via a crafted application that reads a 16-bit value.

Patch / fix

  • linux Debian 14, Debian 13, Debian 12 3.16.7-ckt4-1

debian advisories DEBIAN-CVE-2014-8134

  • linux Ubuntu 14.04 LTS 3.13.0-43.72
  • linux-lts-utopic Ubuntu 14.04 LTS 3.16.0-28.37~14.04.1

ubuntu advisories UBUNTU-CVE-2014-8134

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 6 2.6.32-642.el6
  • perf RHEL 6 2.6.32-642.el6
  • python-perf RHEL 6 2.6.32-642.el6
  • kernel-kdump RHEL 6 2.6.32-642.el6
  • kernel-firmware RHEL 6 2.6.32-642.el6
  • kernel-bootwrapper RHEL 6 2.6.32-642.el6
  • kernel-abi-whitelists RHEL 6 2.6.32-642.el6
  • kernel-debuginfo-common-i686 RHEL 6 2.6.32-642.el6

red hat advisories RHSA-2016:0855

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-2014-8134 updated cvss 1.9

kernel: x86: espfix not working for 32-bit KVM paravirt guests

  • Red Hat Enterprise Linux Desktop (v. 6) perf 2.6.32-642.el6, kernel 2.6.32-642.el6, kernel-firmware 2.6.32-642.el6, kernel-abi-whitelists 2.6.32-642.el6, kernel-debuginfo-common-i686 2.6.32-642.el6, kernel-debuginfo-common-x86_64 2.6.32-642.el6 Red Hat Enterprise Linux Desktop Optional (v. 6) python-perf 2.6.32-642.el6, kernel-debuginfo-common-i686 2.6.32-642.el6, kernel-debuginfo-common-x86_64 2.6.32-642.el6 Red Hat Enterprise Linux HPC Node (v. 6) perf 2.6.32-642.el6, kernel 2.6.32-642.el6, kernel-firmware 2.6.32-642.el6, kernel-abi-whitelists 2.6.32-642.el6, kernel-debuginfo-common-i686 2.6.32-642.el6, kernel-debuginfo-common-x86_64 2.6.32-642.el6 Red Hat Enterprise Linux HPC Node Optional (v. 6) python-perf 2.6.32-642.el6, kernel-debuginfo-common-x86_64 2.6.32-642.el6 Red Hat Enterprise Linux Server (v. 6) perf 2.6.32-642.el6, kernel 2.6.32-642.el6, kernel-kdump 2.6.32-642.el6, kernel-firmware 2.6.32-642.el6, kernel-bootwrapper 2.6.32-642.el6, kernel-abi-whitelists 2.6.32-642.el6, +4 more Red Hat Enterprise Linux Server Optional (v. 6) python-perf 2.6.32-642.el6, kernel-debuginfo-common-i686 2.6.32-642.el6, kernel-debuginfo-common-ppc64 2.6.32-642.el6, kernel-debuginfo-common-s390x 2.6.32-642.el6, kernel-debuginfo-common-x86_64 2.6.32-642.el6
    +2 more products
    Red Hat Enterprise Linux Workstation (v. 6) perf 2.6.32-642.el6, kernel 2.6.32-642.el6, kernel-firmware 2.6.32-642.el6, kernel-abi-whitelists 2.6.32-642.el6, kernel-debuginfo-common-i686 2.6.32-642.el6, kernel-debuginfo-common-x86_64 2.6.32-642.el6 Red Hat Enterprise Linux Workstation Optional (v. 6) python-perf 2.6.32-642.el6, kernel-debuginfo-common-i686 2.6.32-642.el6, kernel-debuginfo-common-x86_64 2.6.32-642.el6
    fixed: vendor fix RHSA-2016:0855
  • Red Hat Enterprise Linux 5 kernel Red Hat Enterprise Linux 7 perf, kernel, bpftool, python-perf, kernel-kdump, kernel-tools, +3 more Red Hat Enterprise MRG 2 kernel
    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

0.70% chance of exploitation in the next 30 days, higher than 53% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

  • spinics.net http://www.spinics.net/lists/kvm/msg111458.html referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.1 3.3 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N
NVD 2.0 1.9 AV:L/AC:M/Au:N/C:P/I:N/A:N

Classification

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.