USN-3127-2: Linux kernel (Trusty HWE) vulnerabilities

Ubuntu Security Notice USN-3127-2

11th November, 2016

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-3127-1 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.

It was discovered that the compression handling code in the Advanced Linux
Sound Architecture (ALSA) subsystem in the Linux kernel did not properly
check for an integer overflow. A local attacker could use this to cause a
denial of service (system crash). ()

Vitaly Kuznetsov discovered that the Linux kernel did not properly suppress
hugetlbfs support in X86 paravirtualized guests. An attacker in the guest
OS could cause a denial of service (guest 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-2016-7042