Heap-based buffer overflow in the Lookup_MarkMarkPos function in the HarfBuzz module (harfbuzz-gpos.c), as used by Qt before 4.7.4 and Pango, allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code via a crafted font file.
https://exchange.xforce.ibmcloud.com/vulnerabilities/69991
http://www.ubuntu.com/usn/USN-1504-1
http://www.securityfocus.com/bid/49723
http://www.openwall.com/lists/oss-security/2011/08/25/1
http://www.openwall.com/lists/oss-security/2011/08/24/8
http://www.openwall.com/lists/oss-security/2011/08/22/6
http://secunia.com/advisories/49895
http://secunia.com/advisories/46410
http://secunia.com/advisories/46371
http://secunia.com/advisories/46128
http://secunia.com/advisories/46119
http://secunia.com/advisories/46118
http://secunia.com/advisories/46117
http://secunia.com/advisories/41537
http://rhn.redhat.com/errata/RHSA-2011-1328.html
http://rhn.redhat.com/errata/RHSA-2011-1327.html
http://rhn.redhat.com/errata/RHSA-2011-1326.html
http://rhn.redhat.com/errata/RHSA-2011-1325.html
http://rhn.redhat.com/errata/RHSA-2011-1324.html
http://rhn.redhat.com/errata/RHSA-2011-1323.html
http://lists.opensuse.org/opensuse-updates/2011-10/msg00008.html
http://lists.opensuse.org/opensuse-updates/2011-10/msg00007.html
http://cgit.freedesktop.org/harfbuzz.old/commit/?id=81c8ef785b079980ad5b46be4fe7c7bf156dbf65