Xen 4.3.x writes hypervisor mappings to certain shadow pagetables when live migration is performed on hosts with more than 5TB of RAM, which allows local 64-bit PV guests to read or write to invalid memory and cause a denial of service (crash).
The MITRE CVE dictionary describes this issue as:
Find out more about CVE-2013-4356 from the MITRE CVE dictionary dictionary and NIST NVD.
This issue does not affect the versions of the kernel-xen package as shipped with Red Hat Enterprise Linux 5.
This issue does not affect the versions of the Linux kernel package as shipped with Red Hat Enterprise Linux 6 and Red Hat Enterprise MRG as it does not have support for Xen hypervisor.
NOTE: The following CVSS v2 metrics and score provided are preliminary and subject to review.
| Base Score | 1 |
|---|---|
| Base Metrics | AV:L/AC:H/Au:S/C:P/I:N/A:N |
| Access Vector | Local |
| Access Complexity | High |
| Authentication | Single |
| Confidentiality Impact | Partial |
| Integrity Impact | None |
| Availability Impact | None |
Find out more about Red Hat support for the Common Vulnerability Scoring System (CVSS).
| Platform | Package | State |
|---|---|---|
| Red Hat Enterprise Linux 5 | kernel-xen | Not affected |
Vulmon