A very serious security problem has been found in the Linux kernel called “The Stack Clash.”
The Qualys Research Labs discovered various problems in the dynamic linker of the GNU C Library (CVE-2017-1000366) which allow local privilege escalation by clashing the stack including Linux kernel. This bug affects Linux, OpenBSD, NetBSD, FreeBSD and Solaris, on i386 and amd64. It can be exploited by attackers to corrupt memory and execute arbitrary code.
An attacker could leverage this with another vulnerability to execute arbitrary code and gain administrative/root account privileges.