Linux PIE/stack corruption (CVE-2017-1000253)
http://www.openwall.com/lists/oss-security/2017/09/26/16 [www.openwall.com]
2017-09-26 18:40
Unfortunately, load_elf_ binary() does not take account of the need to allocate sufficient space for the entire binary which means that, while the first PT_LOAD segment is mapped below mm->mmap_base, the subsequent PT_LOAD segment(s) end up being mapped above mm->mmap_base into the are that is supposed to be the “gap” between the stack and the binary.
source: L