Red Hat Security Advisory 2013-1436-01 – The kernel packages contain the Linux kernel, the core of any Linux operating system. A flaw was found in the way the Linux kernel’s TCP/IP protocol suite implementation handled IPv6 sockets that used the UDP_CORK option. A local, unprivileged user could use this flaw to cause a denial of service. An information leak flaw was found in the way Linux kernel’s device mapper subsystem, under certain conditions, interpreted data written to snapshot block devices. An attacker could use this flaw to read data from disk blocks in free space, which are normally inaccessible…. Red Hat Security Advisory 2013-1436-01 – The kernel packages contain the Linux kernel, the core of any Linux operating system. A flaw was found in the way the Linux kernel’s TCP/IP protocol suite implementation handled IPv6 sockets that used the UDP_CORK option. A local, unprivileged user could use this flaw to cause a denial of service. An information leak flaw was found in the way Linux kernel’s device mapper subsystem, under certain conditions, interpreted data written to snapshot block devices. An attacker could use this flaw to read data from disk blocks in free space, which are normally inaccessible.

Read more http://packetstormsecurity.com/files/123639/RHSA-2013-1436-01.txt