xorg-x11-libX11 was updated to fix one security issue. This security issue was fixed: - CVE-2013-7439: Multiple off-by-one errors in the MakeBigReq and SetReqLen macros in include/X11/Xlibint.h in X11R6.x and libX11 before 1.6.0 allowed remote attackers to have unspecified impact via a crafted request, which triggered a buffer overflow .