From $URL : Description A vulnerability has been reported in the Linux Kernel, which can be exploited by malicious, local users in a guest virtual machine to cause a DoS (Denial of Service). For more information: SA52059 The vulnerability is reported in versions prior to 3.7.10. Solution Update to version 3.7.10. Original Advisory http://www.kernel.org/pub/linux/kernel/v3.0/ChangeLog-3.7.10
There are no longer any 2.x or <3.7.10 kernels available in the repository with the exception of sys-kernel/xbox-sources which is unsupported by security.