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
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disclosed, or updated in CVE.
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