Red Hat Security Advisory: graphite2 security, bug fix, and enhancement update

CVE-2016-1521 — graphite2: Out-of-bound read vulnerability triggered by crafted fonts CVE-2016-1522 — graphite2: Null pointer dereference and out-of-bounds access vulnerabilities CVE-2016-1523 — graphite2: Heap-based buffer overflow in context item handling functionality CVE-2016-1526 — graphite2: Out-of-bounds read vulnerability in TfUtil:LocaLookup