A bug in Linux ASLR implementation which affects some AMD processors has been found. The issue affects to all Linux process even if they are not using shared libraries (statically compiled).
The problem appears because some mmapped objects (VDSO, libraries, etc.) are poorly randomized in an attempt to avoid cache aliasing penalties for AMD Bulldozer (Family 15h) processors.
more here.......http://hmarco.org/bugs/AMD-Bulldozer-linux-ASLR-weakness-reducing-mmaped-files-by-eight.html
The problem appears because some mmapped objects (VDSO, libraries, etc.) are poorly randomized in an attempt to avoid cache aliasing penalties for AMD Bulldozer (Family 15h) processors.
more here.......http://hmarco.org/bugs/AMD-Bulldozer-linux-ASLR-weakness-reducing-mmaped-files-by-eight.html