From https://secunia.com/advisories/50421/ : Description Multiple vulnerabilities have been reported in Linux Kernel, which can be exploited by malicious, local users or malicious people to cause a DoS (Denial of Service). 1) A NULL pointer dereference error when handling deletion of directory hierarchies can be exploited to cause a kernel crash by running "rm -rf" on a large directory hierarchy. Successful exploitation requires an ext4 filesystem on a RAID device. 2) A NULL pointer dereference error in the i.MX clock infrastructure due to missing clock conversion can be exploited to cause a kernel crash by e.g. tricking a user into playing a specially crafted WAV file using aplay. 3) An error while handling an out-of-memory condition can be exploited to exhaust all memory resources. 4) An error due to lack of synchronisation while handling socket options can be exploited to cause a crash. Solution Update to version 3.4.10 or 3.5.3. Provided and/or discovered by 1) The vendor credits Maciej Zenczykowski and Marti Raudsepp. 2) The vendor credits Javier Martin. 3) Tetsuo Handa via Ubuntu bug report. 4) Petr Matousek, Red Hat Security Response Team via OSS-SEC mailing list. Changelog Further details available in Customer Area Original Advisory Kernel.org: http://www.kernel.org/pub/linux/kernel/v3.0/ChangeLog-3.4.10 http://www.kernel.org/pub/linux/kernel/v3.0/ChangeLog-3.5.3 Tetsuo Handa: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/963685 Petr Matousek: http://seclists.org/oss-sec/2012/q3/344
There are no longer any 2.x or <3.4 kernels available in the repository with the exception of sys-kernel/xbox-sources which is unsupported by security.