Stack consumption vulnerability in libxml2 2.5.10, 2.6.16, 2.6.26, 2.6.27,
and 2.6.32, and libxml 1.8.17, allows context-dependent attackers to cause
a denial of service (application crash) via a large depth of element
declarations in a DTD, related to a function recursion, as demonstrated by
the Codenomicon XML fuzzing framework.

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