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.
git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=1b79cd04fab80be61dcd2732e2423aafde9a4c1c
www.kernel.org/pub/linux/kernel/v2.6/testing/v2.6.28/ChangeLog-2.6.28-rc8
www.mandriva.com/security/advisories?name=MDVSA-2010:198
www.openwall.com/lists/oss-security/2010/05/27/1
bugzilla.redhat.com/show_bug.cgi?id=595970
exchange.xforce.ibmcloud.com/vulnerabilities/59224