National Cyber Awareness System

Vulnerability Summary for CVE-2012-2121

Overview

The KVM implementation in the Linux kernel before 3.3.4 does not properly manage the relationships between memory slots and the iommu, which allows guest OS users to cause a denial of service (memory leak and host OS crash) by leveraging administrative access to the guest OS to conduct hotunplug and hotplug operations on devices.

Impact

CVSS Severity (version 2.0):

CVSS Version 2 Metrics:

References to Advisories, Solutions, and Tools

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External Source: CONFIRM

Name: https://github.com/torvalds/linux/commit/09ca8e1173bcb12e2a449698c9ae3b86a8a10195

Hyperlink:https://github.com/torvalds/linux/commit/09ca8e1173bcb12e2a449698c9ae3b86a8a10195

External Source: CONFIRM

Name: https://bugzilla.redhat.com/show_bug.cgi?id=814149

Hyperlink:https://bugzilla.redhat.com/show_bug.cgi?id=814149

External Source: UBUNTU

Name: USN-1577-1

Hyperlink:http://www.ubuntu.com/usn/USN-1577-1

External Source: SECTRACK

Name: 1027083

Hyperlink:http://www.securitytracker.com/id?1027083

External Source: MLIST

Name: [oss-security] 20120419 Re: CVE request -- kernel: kvm: device assignment page leak

Hyperlink:http://www.openwall.com/lists/oss-security/2012/04/19/16

External Source: CONFIRM

Name: http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.3.4

Hyperlink:http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.3.4

External Source: SECUNIA

Name: 50732

Hyperlink:http://secunia.com/advisories/50732

External Source: REDHAT

Name: RHSA-2012:0743

Hyperlink:http://rhn.redhat.com/errata/RHSA-2012-0743.html