USN-3364-2: Linux kernel (Xenial HWE) vulnerabilities

Ubuntu Security Notice USN-3364-2

24th July, 2017

linux-lts-xenial vulnerabilities

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

• Ubuntu 14.04 LTS

Summary

Several security issues were fixed in the Linux kernel.

Software description

• linux-lts-xenial
  - Linux hardware enablement kernel from Xenial for Trusty
  
  

Details

USN-3364-1 fixed vulnerabilities in the Linux kernel for Ubuntu 16.04
LTS. This update provides the corresponding updates for the Linux
Hardware Enablement (HWE) kernel from Ubuntu 16.04 LTS for Ubuntu
14.04 LTS.

It was discovered that the Linux kernel did not properly initialize a Wake-
on-Lan data structure. A local attacker could use this to expose sensitive
information (kernel memory). ()

Alexander Potapenko discovered a race condition in the Advanced Linux Sound
Architecture (ALSA) subsystem in the Linux kernel. A local attacker could
use this to expose sensitive information (kernel memory).
()

Jann Horn discovered that bpf in Linux kernel does not restrict the output
of the print_bpf_insn function. A local attacker could use this to obtain
sensitive address information. ()

Update instructions

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

Ubuntu 14.04 LTS:

To update your system, please follow these instructions:
,

,

,

CVE-2017-9605