CVE-2013-6425
Integer underflow in the pixman_trapezoid_valid macro in pixman.h in Pixman before 0.32.0, as used in X.Org server and cairo, allows context-dependent attackers to cause a denial of service (crash) via a negative bottom value.
Date published : 2014-01-18
http://cgit.freedesktop.org/pixman/commit/?id=5e14da97f16e421d084a9e735be21b1025150f0c