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TITLE:
KVM Device Mapping Memory Leak Denial of Service Vulnerability

SECUNIA ADVISORY ID:
SA48852

VERIFY ADVISORY:
Secunia.com
http://secunia.com/advisories/48852/
Customer Area (Credentials Required)
https://ca.secunia.com/?page=viewadvisory&vuln_id=48852

RELEASE DATE:
2012-04-19

DISCUSS ADVISORY:
http://secunia.com/advisories/48852/#comments

AVAILABLE ON SITE AND IN CUSTOMER AREA:
 * Last Update
 * Popularity
 * Comments
 * Criticality Level
 * Impact
 * Where
 * Solution Status
 * Operating System / Software
 * CVE Reference(s)

http://secunia.com/advisories/48852/

ONLY AVAILABLE IN CUSTOMER AREA:
 * Authentication Level
 * Report Reliability
 * Secunia PoC
 * Secunia Analysis
 * Systems Affected
 * Approve Distribution
 * Remediation Status
 * Secunia CVSS Score
 * CVSS

https://ca.secunia.com/?page=viewadvisory&vuln_id=48852

ONLY AVAILABLE WITH SECUNIA CSI AND SECUNIA PSI:
 * AUTOMATED SCANNING

http://secunia.com/vulnerability_scanning/personal/
http://secunia.com/vulnerability_scanning/corporate/wsus_sccm_3rd_third_party_patching/

DESCRIPTION:
A vulnerability has been reported in KVM, which can be exploited by
malicious, local users in a guest virtual machine to cause a DoS
(Denial of Service).

The vulnerability is caused due a memory leak error when unpinning
device mappings from the IOMMU. This can be exploited to exhaust
memory and render the system unusable by unplugging and plugging
certain devices.

SOLUTION:
Fixed in the GIT repository.

PROVIDED AND/OR DISCOVERED BY:
Alex Williamson in a bug report.

ORIGINAL ADVISORY:
https://lkml.org/lkml/2012/4/11/248

OTHER REFERENCES:
Further details available in Customer Area:
http://secunia.com/vulnerability_intelligence/

DEEP LINKS:
Further details available in Customer Area:
http://secunia.com/vulnerability_intelligence/

EXTENDED DESCRIPTION:
Further details available in Customer Area:
http://secunia.com/vulnerability_intelligence/

EXTENDED SOLUTION:
Further details available in Customer Area:
http://secunia.com/vulnerability_intelligence/

EXPLOIT:
Further details available in Customer Area:
http://secunia.com/vulnerability_intelligence/

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About:
This Advisory was delivered by Secunia as a free service to help
private users keeping their systems up to date against the latest
vulnerabilities.

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Definitions: (Criticality, Where etc.)
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Please Note:
Secunia recommends that you verify all advisories you receive by
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Secunia NEVER sends attached files with advisories.
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use those supplied by the vendor.

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