A flaw was discovered in the Linux kernel’s handling of new hot-plugged memory. An unprivileged local user could exploit this flaw to cause a denial of service by crashing the system.
Updated packages are available from security.ubuntu.com.
========================================================================== Ubuntu Security Notice USN-1671-1 December 19, 2012 linux vulnerability ========================================================================== A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 12.10 Summary: The system could be made to crash under certain conditions. Software Description: - linux: Linux kernel Details: A flaw was discovered in the Linux kernel's handling of new hot-plugged memory. An unprivileged local user could exploit this flaw to cause a denial of service by crashing the system. Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 12.10: linux-image-3.5.0-21-generic 3.5.0-21.32 linux-image-3.5.0-21-highbank 3.5.0-21.32 linux-image-3.5.0-21-omap 3.5.0-21.32 linux-image-3.5.0-21-powerpc-smp 3.5.0-21.32 linux-image-3.5.0-21-powerpc64-smp 3.5.0-21.32 After a standard system update you need to reboot your computer to make all the necessary changes. ATTENTION: Due to an unavoidable ABI change the kernel updates have been given a new version number, which requires you to recompile and reinstall all third party kernel modules you might have installed. If you use linux-restricted-modules, you have to update that package as well to get modules which work with the new kernel version. Unless you manually uninstalled the standard kernel metapackages (e.g. linux-generic, linux-server, linux-powerpc), a standard system upgrade will automatically perform this as well. References: http://www.ubuntu.com/usn/usn-1671-1 CVE-2012-5517 Package Information: https://launchpad.net/ubuntu/+source/linux/3.5.0-21.32