mm/shmem.c in the Linux kernel before 2.6.28-rc8, when strict overcommit is enabled and CONFIG_SECURITY is disabled, does not properly handle the export of shmemfs objects by knfsd, which allows attackers to cause a denial of service (NULL pointer dereference and knfsd crash) or possibly have unspecified other impact via unknown vectors. NOTE: this vulnerability exists because of an incomplete fix for CVE-2010-1643.
https://exchange.xforce.ibmcloud.com/vulnerabilities/59224
https://bugzilla.redhat.com/show_bug.cgi?id=595970
http://www.openwall.com/lists/oss-security/2010/05/27/1
http://www.mandriva.com/security/advisories?name=MDVSA-2010:198
http://www.kernel.org/pub/linux/kernel/v2.6/testing/v2.6.28/ChangeLog-2.6.28-rc8