hb-ot-layout-gpos-table.hh in HarfBuzz before 1.0.5 allows remote attackers to cause a denial of service (buffer over-read) or possibly have unspecified other impact via crafted data, a different vulnerability than CVE-2016-2052. http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2015-8947
