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: https://access.redhat.com/support/policy/updates/errata/.
| 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).
| 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 |
| Platform | Package | State |
|---|---|---|
| Red Hat Enterprise MRG 2 | realtime-kernel | Not affected |
| Red Hat Enterprise Linux 5 | kvm | Will not fix |
Vulmon