libxfixes vulnerabilities (Debian)

2 vulnerabilities.

• libxfixes Debian Integer overflow in X.org libXfixes before 5.0.3 on 32-bit platforms might allow remote X servers... CVE-2016-7944 Fix available 9.8 CriticalOctober 12, 2016
• libxfixes Debian Integer overflow in X.org libXfixes 5.0 and earlier allows X servers to trigger allocation of... CVE-2013-1983 Fix available 6.8 MediumMay 23, 2013