USN-3035-1: Linux kernel vulnerability
14 July 2016
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 15.10
The system could be made to crash under certain conditions.
- linux - Linux kernel
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).
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
To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.
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.