A flaw was discovered in processing setsockopt for 32 bit processes on 64 bit systems. This flaw will allow attackers to alter arbitary kernel memory when unloading a kernel module. This action is usually restricted to root-priveledged users but can also be leveraged if the kernel is compiled with CONFIG_USER_NS and CONFIG_NET_NS and the user is granted elevated priveledges. This flaw was introduced in commit 52e804c6dfaa, Upstream fixes http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=ce683e5f9d04 http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=6e94e0cfb088 http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=bdf533de6968 Discussion on oss-sec: http://www.openwall.com/lists/oss-security/2016/06/24/5
