USN-3035-1: Linux kernel vulnerability
14 July 2016
The system could be made to crash under certain conditions.
Releases
Packages
- 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-powerpc64-smp
-
4.2.0-42.49
-
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-powerpc64-emb
-
4.2.0-42.49
-
linux-image-4.2.0-42-powerpc-e500mc
-
4.2.0-42.49
-
linux-image-4.2.0-42-lowlatency
-
4.2.0-42.49
-
linux-image-4.2.0-42-powerpc-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.