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TITLE:
Linux Kernel "__split_huge_page()" Race Condition Denial of Service
Vulnerability

SECUNIA ADVISORY ID:
SA48404

VERIFY ADVISORY:
Secunia.com
http://secunia.com/advisories/48404/
Customer Area (Credentials Required)
https://ca.secunia.com/?page=viewadvisory&vuln_id=48404

RELEASE DATE:
2012-03-16

DISCUSS ADVISORY:
http://secunia.com/advisories/48404/#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/48404/

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=48404

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 the Linux Kernel, which can be
exploited by malicious, local users and malicious, local users in a
guest virtual machine cause a DoS (Denial of Service).

The vulnerability is caused due to a race condition when handling PMD
table entries after a "bad pmd" occurs and can be exploited to cause a
kernel crash.

SOLUTION:
Restrict access to trusted users only.

PROVIDED AND/OR DISCOVERED BY:
Ulrich Obergfell

ORIGINAL ADVISORY:
http://comments.gmane.org/gmane.linux.kernel.mm/75413

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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