Heap-based buffer overflow in the process_tx_desc function in the e1000 emulation (hw/e1000.c) in qemu-kvm 0.12, and possibly other versions, allows guest OS users to cause a denial of service (QEMU crash) and possibly execute arbitrary code via crafted legacy mode packets.
https://exchange.xforce.ibmcloud.com/vulnerabilities/72656
https://bugzilla.redhat.com/show_bug.cgi?id=772075
http://www.ubuntu.com/usn/USN-1339-1
http://www.securityfocus.com/bid/51642
http://www.redhat.com/support/errata/RHSA-2012-0050.html
http://secunia.com/advisories/50913
http://secunia.com/advisories/48318
http://secunia.com/advisories/47992
http://secunia.com/advisories/47741
http://secunia.com/advisories/47740
http://rhn.redhat.com/errata/RHSA-2012-0370.html
http://lists.opensuse.org/opensuse-updates/2012-02/msg00009.html
http://lists.opensuse.org/opensuse-security-announce/2012-10/msg00002.html
http://lists.fedoraproject.org/pipermail/package-announce/2012-June/081972.html
http://git.qemu.org/?p=qemu.git%3Ba=log%3Bh=refs/heads/stable-1.0