QEMU (aka Quick Emulator) built with the NE2000 device emulation support is vulnerable to an OOB r/w access issue. It could occur while performing 'ioport' r/w operations. A privileged (CAP_SYS_RAWIO) user/process could use this flaw to leak or corrupt QEMU memory bytes.
https://security.gentoo.org/glsa/201602-01
https://lists.gnu.org/archive/html/qemu-devel/2016-01/msg00050.html
https://bugzilla.redhat.com/show_bug.cgi?id=1264929
http://www.securitytracker.com/id/1034574
http://www.securityfocus.com/bid/79820
http://www.openwall.com/lists/oss-security/2016/01/04/2
http://www.openwall.com/lists/oss-security/2016/01/04/1
http://www.debian.org/security/2016/dsa-3471