Use-after-free vulnerability in the EbmlMaster::Read function in libEBML before 1.3.3 allows context-dependent attackers to have unspecified impact via a "deeply nested element with infinite size" followed by another element of an upper level in an EBML document.
Debian Linux Security Advisory 3538-1 - Several vulnerabilities were discovered in libebml, a library for manipulating Extensible Binary Meta Language files.