The vulnerability of the Pixman library allows a attacker to trigger a service failure (application termination) or execute arbitrary code.

The vulnerability of the createbits function in the Pixman-bits-image.c library is due to a numerical overflow condition. Exploiting this vulnerability could allow an attacker, operating remotely, to cause a service failure termination of the application or execute arbitrary code...

DEBIAN-CVE-2014-9766

Integer overflow in the createbits function in pixman-bits-image.c in Pixman before 0.32.6 allows remote attackers to cause a denial of service application crash or possibly execute arbitrary code via large height and stride values...