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Fencer Intel
medium 4.9

CVE-2014-7842 json

Race condition in arch/x86/kvm/x86.c in the Linux kernel before 3.17.4 allows guest OS users to cause a denial of service (guest OS crash)…

published 11y ago modified 4mo ago also EUVD-2014-7696

cvss
4.9
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.4%
EPSS 0.4% chance of exploitation in 30 days, percentile 31%
public exploits
0
none known

Summary

Race condition in arch/x86/kvm/x86.c in the Linux kernel before 3.17.4 allows guest OS users to cause a denial of service (guest OS crash) via a crafted application that performs an MMIO transaction or a PIO transaction to trigger a guest userspace emulation error report, a similar issue to CVE-2010-5313.

Patch / fix

  • linux Debian 14, Debian 13, Debian 12 3.16.7-ckt2-1

debian advisories DEBIAN-CVE-2014-7842

  • linux Ubuntu 14.04 LTS 3.13.0-44.73
  • linux-lts-utopic Ubuntu 14.04 LTS 3.16.0-29.39~14.04.1

ubuntu advisories UBUNTU-CVE-2014-7842

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-2016:0855RHSA-2015:2152

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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-2014-7842 updated cvss 4.0

kernel: kvm: reporting emulation failures to userspace

  • Red Hat Enterprise Linux Client (v. 7) perf 3.10.0-327.el7, kernel 3.10.0-327.el7, python-perf 3.10.0-327.el7, kernel-tools 3.10.0-327.el7, kernel-tools-libs 3.10.0-327.el7, kernel-abi-whitelists 3.10.0-327.el7, +1 more Red Hat Enterprise Linux Client Optional (v. 7) kernel-debuginfo-common-x86_64 3.10.0-327.el7 Red Hat Enterprise Linux ComputeNode (v. 7) perf 3.10.0-327.el7, kernel 3.10.0-327.el7, python-perf 3.10.0-327.el7, kernel-tools 3.10.0-327.el7, kernel-tools-libs 3.10.0-327.el7, kernel-abi-whitelists 3.10.0-327.el7, +1 more Red Hat Enterprise Linux ComputeNode Optional (v. 7) kernel-debuginfo-common-x86_64 3.10.0-327.el7
    fixed: vendor fix RHSA-2015:2152
  • 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
    fixed: vendor fix RHSA-2016:0855
  • Red Hat Enterprise Linux Server (v. 7) perf 3.10.0-327.el7, kernel 3.10.0-327.el7, python-perf 3.10.0-327.el7, kernel-kdump 3.10.0-327.el7, kernel-tools 3.10.0-327.el7, kernel-tools-libs 3.10.0-327.el7, +6 more
    fixed: vendor fix RHSA-2015:2152
  • 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
    fixed: vendor fix RHSA-2016:0855
  • Red Hat Enterprise Linux Server Optional (v. 7) kernel-debuginfo-common-ppc64 3.10.0-327.el7, kernel-debuginfo-common-x86_64 3.10.0-327.el7, kernel-debuginfo-common-ppc64le 3.10.0-327.el7
    fixed: vendor fix RHSA-2015:2152
  • 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
    fixed: vendor fix RHSA-2016:0855
  • Red Hat Enterprise Linux Workstation (v. 7) perf 3.10.0-327.el7, kernel 3.10.0-327.el7, python-perf 3.10.0-327.el7, kernel-tools 3.10.0-327.el7, kernel-tools-libs 3.10.0-327.el7, kernel-abi-whitelists 3.10.0-327.el7, +1 more
    fixed: vendor fix RHSA-2015:2152
  • 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
show 2 more
  • Red Hat Enterprise Linux Workstation Optional (v. 7) kernel-debuginfo-common-x86_64 3.10.0-327.el7
    fixed: vendor fix RHSA-2015:2152
  • Red Hat Enterprise Linux 5 kernel Red Hat Enterprise Linux 7 kernel-rt, kernel-rt-kvm, kernel-rt-trace, kernel-rt-debug-kvm, kernel-rt-trace-kvm 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

0.37% chance of exploitation in the next 30 days, higher than 31% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 2.0 4.9 AV:L/AC:L/Au:N/C:N/I:N/A:C

Classification

Weakness
  • CWE-362 Concurrent Execution using Shared Resource with Improper Synchronization
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.