USN-3420-1: Linux kernel vulnerabilities

Ubuntu Security Notice USN-3420-1

18th September, 2017

linux, linux-aws, linux-gke, linux-kvm, linux-raspi2, linux-snapdragon vulnerabilities

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

• Ubuntu 16.04 LTS

Summary

Several security issues were fixed in the Linux kernel.

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-kvm
  - Linux kernel for cloud environments
  
  





• linux-raspi2
  - Linux kernel for Raspberry Pi 2
  
  





• linux-snapdragon
  - Linux kernel for Snapdragon processors
  
  

Details

It was discovered that a buffer overflow existed in the Bluetooth stack of
the Linux kernel when handling L2CAP configuration responses. A physically
proximate attacker could use this to cause a denial of service (system
crash). ()

It was discovered that a buffer overflow existed in the ioctl handling code
in the ISDN subsystem of the Linux kernel. A local attacker could use this
to cause a denial of service (system crash) or possibly execute arbitrary
code. ()

Update instructions

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

Ubuntu 16.04 LTS:

linux-image-powerpc-e500mc 4.4.0.96.101

linux-image-snapdragon 4.4.0.1076.68

linux-image-powerpc64-emb 4.4.0.96.101

linux-image-gke 4.4.0.1031.32

linux-image-generic 4.4.0.96.101

linux-image-aws 4.4.0.1035.37

linux-image-kvm 4.4.0.1007.7

linux-image-raspi2 4.4.0.1074.74

linux-image-powerpc-smp 4.4.0.96.101

linux-image-generic-lpae 4.4.0.96.101

linux-image-powerpc64-smp 4.4.0.96.101

linux-image-lowlatency 4.4.0.96.101

To update your system, please follow these instructions:
,

,

CVE-2017-8831