CVE Database


Impact: Low
Public: 2013-09-30
Bugzilla: 1009817: CVE-2013-4361 Kernel: Xen: Xsa-66: information leak through fbld instruction emulation


The MITRE CVE dictionary describes this issue as:

The fbld instruction emulation in Xen 3.3.x through 4.3.x does not use the correct variable for the source effective address, which allows local HVM guests to obtain hypervisor stack information by reading the values used by the instruction.

Find out more about CVE-2013-4361 from the MITRE CVE 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.

CVSS v2 metrics

NOTE: The following CVSS v2 metrics and score provided are preliminary and subject to review.

Base Score: 1.0
Base Metrics: AV:L/AC:H/Au:S/C:P/I:N/A:N
Access Vector: Local
Access Complexity: High
Authentication: Single Instance
Confidentiality Impact: Partial
Integrity Impact: None
Availability Impact: None

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

Red Hat security errata

Platform Errata Release Date

External References


Red Hat would like to thank the Xen project for reporting this issue.

This page is generated automatically and has not been checked for errors or omissions.

For clarification or corrections please contact the Red Hat Security Response Team.