Public Date:
877391: CVE-2012-5513 kernel: xen: XENMEM_exchange may overwrite hypervisor memory

The MITRE CVE dictionary describes this issue as:

The XENMEM_exchange handler in Xen 4.2 and earlier does not properly check the memory address, which allows local PV guest OS administrators to cause a denial of service (crash) or possibly gain privileges via unspecified vectors that overwrite memory in the hypervisor reserved range.

Find out more about CVE-2012-5513 from the MITRE CVE dictionary dictionary and NIST NVD.


This issue did affect the versions of the kernel-xen package as shipped with Red Hat Enterprise Linux 5. This issue did not affect Red Hat Enterprise Linux 6 and Red Hat Enterprise MRG as we did 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 7.4
Base Metrics AV:A/AC:M/Au:S/C:C/I:C/A:C
Access Vector Adjacent Network
Access Complexity Medium
Authentication Single
Confidentiality Impact Complete
Integrity Impact Complete
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 version 5 (kernel) RHSA-2012:1540 2012-12-04

Affected Packages State

Platform Package State
Red Hat Enterprise Linux 5 kernel-xen Affected
Red Hat Enterprise Linux EUS (v. 5.9 server) kernel-xen Affected


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