USN-3168-2: Linux kernel (Trusty HWE) vulnerabilities

Ubuntu Security Notice USN-3168-2

11th January, 2017

linux-lts-trusty vulnerabilities

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

• Ubuntu 12.04 LTS

Summary

Several security issues were fixed in the kernel.

Software description

• linux-lts-trusty
  - Linux hardware enablement kernel from Trusty for Precise
  
  

Details

USN-3168-1 fixed vulnerabilities in the Linux kernel for Ubuntu 14.04
LTS. This update provides the corresponding updates for the Linux
Hardware Enablement (HWE) kernel from Ubuntu 14.04 LTS for Ubuntu
12.04 LTS.

Dmitry Vyukov discovered that the KVM implementation in the Linux kernel
did not properly initialize the Code Segment (CS) in certain error cases. A
local attacker could use this to expose sensitive information (kernel
memory). ()

Baozeng Ding discovered a race condition that could lead to a use-after-
free in the Advanced Linux Sound Architecture (ALSA) subsystem of the Linux
kernel. 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 12.04 LTS:

To update your system, please follow these instructions:
,

,

CVE-2016-9806