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CVE Database

CVE-2012-2934

Impact: Moderate
Public: 2012-06-12
Bugzilla: 824966: CVE-2012-2934 kernel: denial of service due to AMD Erratum #121

Details

The MITRE CVE dictionary describes this issue as:

Xen 4.0, and 4.1, when running a 64-bit PV guest on "older" AMD CPUs, does not properly protect against a certain AMD processor bug, which allows local guest OS users to cause a denial of service (host hang) via sequential execution of instructions across a non-canonical boundary, a different vulnerability than CVE-2012-0217.

Find out more about CVE-2012-2934 from the MITRE CVE dictionary and NIST NVD.

Statement

This issue did not affect the versions of the Linux kernel as shipped with Red Hat Enterprise Linux 5 and 6, and Red Hat Enterprise MRG, as those versions have a guard page between the end of the user-mode accessible virtual address space and the beginning of the non-canonical area due to CVE-2005-1764 fix.

This issue did affect the versions of Xen hypervisor as shipped with Red Hat Enterprise Linux 5. A kernel-xen update for Red Hat Enterprise Linux 5 is available to address this flaw.

CVSS v2 metrics

Base Score: 4.6
Base Metrics: AV:A/AC:H/Au:N/C:N/I:N/A:C
Access Vector: Adjacent Network
Access Complexity: High
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 version 5 (kernel) RHSA-2012:0721 June 12, 2012

External References

Acknowledgements

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.