The ldm_frag_add function in fs/partitions/ldm.c in the Linux kernel before
2.6.39.1 does not properly handle memory allocation for non-initial
fragments, which might allow local users to conduct buffer overflow
attacks, and gain privileges or obtain sensitive information, via a crafted
LDM partition table. NOTE: this vulnerability exists because of an
incomplete fix for CVE-2011-1017.

Ben Hutchings reported a flaw in the kernel's handling of corrupt LDM
partitions. A local user could exploit this to cause a denial of service or
escalate privileges.