Public Date:
1153322: CVE-2014-3690 kernel: kvm: vmx: invalid host cr4 handling across vm entries
It was found that the Linux kernel's KVM implementation did not ensure that the host CR4 control register value remained unchanged across VM entries on the same virtual CPU. A local, unprivileged user could use this flaw to cause a denial of service on the system.

Find out more about CVE-2014-3690 from the MITRE CVE dictionary dictionary and NIST NVD.


This issue does affects the Linux kernel packages as shipped with Red Hat
Enterprise Linux 6 and 7. Future updates may address this issue in the
respective Red Hat Enterprise Linux releases.

This issue does affect the kvm packages as shipped with Red Hat Enterprise Linux 5, even though the impact is limited.

Red Hat Enterprise Linux 5 is now in Production 3 Phase of the support and maintenance life cycle. This has been rated as having Moderate security impact and is not currently planned to be addressed in future updates. For additional information, refer to the Red Hat Enterprise Linux Life Cycle:

CVSS v2 metrics

Base Score 4.7
Base Metrics AV:L/AC:M/Au:N/C:N/I:N/A:C
Access Vector Local
Access Complexity Medium
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-2015:0864 2015-04-21
Red Hat Enterprise Linux 7 (kernel) RHSA-2015:0290 2015-03-05
Red Hat Enterprise Linux Extended Update Support 6.5 (kernel) RHSA-2015:0782 2015-04-07

Affected Packages State

Platform Package State
Red Hat Enterprise MRG 2 realtime-kernel Not affected
Red Hat Enterprise Linux 5 kvm Will not fix


Red Hat would like to thank Andy Lutomirski for reporting this issue.
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