USN-3256-1: Linux kernel vulnerability

Ubuntu Security Notice USN-3256-1

4th April, 2017

linux, linux-aws, linux-gke, linux-raspi2, linux-snapdragon, linux-ti-omap4 vulnerability

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

• Ubuntu 16.10



• Ubuntu 16.04 LTS



• Ubuntu 14.04 LTS



• Ubuntu 12.04 LTS

Summary

The system could be made to crash under certain conditions.

Software description

• linux
  - Linux kernel
  
  











• linux-aws
  - Linux kernel for Amazon Web Services (AWS) systems
  
  





• 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
  
  





• linux-ti-omap4
  - Linux kernel for OMAP4
  
  

Details

Andrey Konovalov discovered that the AF_PACKET implementation in the Linux
kernel did not properly validate certain block-size data. 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 version:

Ubuntu 16.10:

linux-image-powerpc-smp 4.8.0.46.58

linux-image-powerpc-e500mc 4.8.0.46.58

linux-image-generic 4.8.0.46.58

linux-image-generic-lpae 4.8.0.46.58

linux-image-lowlatency 4.8.0.46.58

linux-image-raspi2 4.8.0.1033.37

linux-image-powerpc64-smp 4.8.0.46.58

Ubuntu 16.04 LTS:

linux-image-powerpc-e500mc 4.4.0.72.78

linux-image-powerpc64-smp-lts-utopic 4.4.0.72.78

linux-image-powerpc64-smp-lts-xenial 4.4.0.72.78

linux-image-gke 4.4.0.1010.12

linux-image-powerpc64-smp-lts-vivid 4.4.0.72.78

linux-image-generic 4.4.0.72.78

linux-image-snapdragon 4.4.0.1055.48

linux-image-aws 4.4.0.1013.16

linux-image-raspi2 4.4.0.1052.53

linux-image-powerpc-smp 4.4.0.72.78

linux-image-generic-lpae 4.4.0.72.78

linux-image-powerpc64-smp-lts-wily 4.4.0.72.78

linux-image-powerpc64-smp 4.4.0.72.78

linux-image-lowlatency 4.4.0.72.78

Ubuntu 14.04 LTS:

Ubuntu 12.04 LTS:

linux-image-powerpc-smp 3.2.0.126.141

linux-image-generic 3.2.0.126.141

linux-image-generic-pae 3.2.0.126.141

linux-image-highbank 3.2.0.126.141

linux-image-powerpc64-smp 3.2.0.126.141

linux-image-omap4 3.2.0.1504.99

linux-image-omap 3.2.0.126.141

linux-image-virtual 3.2.0.126.141

To update your system, please follow these instructions: