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2017-07-26 Jay Berkenbilt <ejb@ql.org>
+ * CVE-2017-9208: Handle references to and appearance of object 0
+ as a special case. Object 0 is not allowed, and qpdf was using it
+ internally to represent direct objects.
+
* CVE-2017-9209: Fix infinite loop caused by attempting to
reconstruct the xref table while already in the process of
reconstructing the xref table.