Ubuntu Security Notice USN-3220-1
7th March, 2017
linux, linux-gke, linux-raspi2, linux-snapdragon vulnerability
A security issue affects these releases of Ubuntu and its
derivatives:
- Ubuntu 16.04 LTS
Summary
The system could be made to crash or run programs as an administrator.
Software description
- linux
– Linux kernel - linux-gke
– Linux Kernel for Google Container Engine (GKE) systems - linux-raspi2
– Linux kernel for Raspberry Pi 2 - linux-snapdragon
– Linux kernel for Snapdragon Processors
Details
Alexander Popov discovered that the N_HDLC line discipline implementation
in the Linux kernel contained a double-free vulnerability. A local attacker
could use this to cause a denial of service (system crash) or possibly gain
administrative privileges.
Update instructions
The problem can be corrected by updating your system to the following
package version:
- Ubuntu 16.04 LTS:
- linux-image-gke 4.4.0.1005.5
-
linux-image-4.4.0-1005-gke
4.4.0-1005.6
- linux-image-raspi2 4.4.0.1046.45
-
linux-image-4.4.0-66-powerpc64-emb
4.4.0-66.87
-
linux-image-4.4.0-66-generic
4.4.0-66.87
- linux-image-powerpc-smp 4.4.0.66.70
- linux-image-generic 4.4.0.66.70
- linux-image-powerpc-e500mc 4.4.0.66.70
-
linux-image-4.4.0-66-powerpc64-smp
4.4.0-66.87
- linux-image-lowlatency 4.4.0.66.70
-
linux-image-4.4.0-66-generic-lpae
4.4.0-66.87
-
linux-image-4.4.0-66-lowlatency
4.4.0-66.87
- linux-image-powerpc64-smp 4.4.0.66.70
-
linux-image-4.4.0-66-powerpc-smp
4.4.0-66.87
- linux-image-generic-lpae 4.4.0.66.70
- linux-image-snapdragon 4.4.0.1050.42
-
linux-image-4.4.0-66-powerpc-e500mc
4.4.0-66.87
- linux-image-powerpc64-emb 4.4.0.66.70
-
linux-image-4.4.0-1046-raspi2
4.4.0-1046.53
-
linux-image-4.4.0-1050-snapdragon
4.4.0-1050.54
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.