SELinux policycoreutils allows local users to execute arbitrary commands outside of the sandbox via a crafted TIOCSTI ioctl call.
rhn.redhat.com/errata/RHSA-2016-2702.html
rhn.redhat.com/errata/RHSA-2017-0535.html
rhn.redhat.com/errata/RHSA-2017-0536.html
www.openwall.com/lists/oss-security/2016/09/25/1
www.securityfocus.com/bid/93156
www.securitytracker.com/id/1037283
github.com/SELinuxProject/selinux/commit/acca96a135a4d2a028ba9b636886af99c0915379
lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UPRNK3PWMAVNJZ53YW5GOEOGJSFNAQIF/
marc.info/?l=selinux&m=147465160112766&w=2