4.6 - USN-3035-1

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 15.10

Summary:

The system could be made to crash under certain conditions.

Software Description: - linux: Linux kernel

Details:

Jan Stancek discovered that the Linux kernel's memory manager did not properly handle moving pages mapped by the asynchronous I/O (AIO) ring buffer to the other nodes. A local attacker could use this to cause a denial of service (system crash).

Update instructions:

The problem can be corrected by updating your system to the following package versions:

Ubuntu 15.10:
linux-image-4.2.0-42-generic 4.2.0-42.49
linux-image-4.2.0-42-generic-lpae 4.2.0-42.49
linux-image-4.2.0-42-lowlatency 4.2.0-42.49
linux-image-4.2.0-42-powerpc-e500mc 4.2.0-42.49
linux-image-4.2.0-42-powerpc-smp 4.2.0-42.49
linux-image-4.2.0-42-powerpc64-emb 4.2.0-42.49
linux-image-4.2.0-42-powerpc64-smp 4.2.0-42.49

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. Unless you manually uninstalled the standard kernel metapackages (e.g. linux-generic, linux-generic-lts-RELEASE, linux-virtual, linux-powerpc), a standard system upgrade will automatically perform this as well.

References:
http://www.ubuntu.com/usn/usn-3035-1
CVE-2016-3070

Package Information:
https://launchpad.net/ubuntu/+source/linux/4.2.0-42.49