Public Date:
1163762: CVE-2010-5313 CVE-2014-7842 kernel: kvm: reporting emulation failures to userspace
It was found that reporting emulation failures to user space could lead to either a local (CVE-2014-7842) or a L2->L1 (CVE-2010-5313) denial of service. In the case of a local denial of service, an attacker must have access to the MMIO area or be able to access an I/O port. Please note that on certain systems, HPET is mapped to userspace as part of vdso (vvar) and thus an unprivileged user may generate MMIO transactions (and enter the emulator) this way.

Find out more about CVE-2014-7842 from the MITRE CVE dictionary dictionary and NIST NVD.


This issue did not affect the kvm packages as shipped with Red Hat Enterprise Linux 5.

CVSS v2 metrics

Base Score 4
Base Metrics AV:L/AC:H/Au:N/C:N/I:N/A:C
Access Vector Local
Access Complexity High
Authentication None
Confidentiality Impact None
Integrity Impact None
Availability Impact Complete

Find out more about Red Hat support for the Common Vulnerability Scoring System (CVSS).

Red Hat Security Errata

Platform Errata Release Date
Red Hat Enterprise Linux 6 (kernel) RHSA-2016:0855 2016-05-10
Red Hat Enterprise Linux 7 (kernel) RHSA-2015:2152 2015-11-19

Affected Packages State

Platform Package State
Red Hat Enterprise MRG 2 realtime-kernel Not affected
Red Hat Enterprise Linux 7 kernel-rt Not affected
Red Hat Enterprise Linux 5 kernel Not affected
Unless explicitly stated as not affected, all previous versions of packages in any minor update stream of a product listed here should be assumed vulnerable, although may not have been subject to full analysis.


Red Hat would like to thank Nadav Amit for reporting this issue.
Last Modified