USN-3206-1: Linux kernel vulnerabilities

22 February 2017

Several security issues were fixed in the kernel.

Releases

Packages

Details

It was discovered that a use-after-free vulnerability existed in the block
device layer of the Linux kernel. A local attacker could use this to cause
a denial of service (system crash) or possibly gain administrative
privileges. (CVE-2016-7910)

Dmitry Vyukov discovered a use-after-free vulnerability in the
sys_ioprio_get() function in the Linux kernel. A local attacker could
use this to cause a denial of service (system crash) or possibly gain
administrative privileges. (CVE-2016-7911)

Andrey Konovalov discovered a use-after-free vulnerability in the DCCP
implementation in the Linux kernel. A local attacker could use this to
cause a denial of service (system crash) or possibly gain administrative
privileges. (CVE-2017-6074)

Update instructions

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

Ubuntu 12.04

After a standard system update you need to reboot your computer to make
all the necessary changes.

ATTENTION: Due to an unavoidable ABI change the kernel updates have
been given a new version number, which requires you to recompile and
reinstall all third party kernel modules you might have installed.
Unless you manually uninstalled the standard kernel metapackages
(e.g. linux-generic, linux-generic-lts-RELEASE, linux-virtual,
linux-powerpc), a standard system upgrade will automatically perform
this as well.

Related notices

  • USN-3207-1: linux-image-3.13.0-110-powerpc64-emb, linux-image-3.13.0-110-powerpc64-smp, linux-image-3.13.0-110-powerpc-e500mc, linux-image-3.13.0-110-generic-lpae, linux, linux-image-extra-3.13.0-110-generic, linux-image-3.13.0-110-powerpc-e500, linux-image-3.13.0-110-generic, linux-image-3.13.0-110-lowlatency, linux-image-3.13.0-110-powerpc-smp
  • USN-3209-1: linux-image-4.8.0-39-lowlatency, linux-image-4.8.0-39-powerpc-e500mc, linux-image-powerpc-e500mc, linux-image-4.8.0-1026-raspi2, linux, linux-image-4.8.0-39-generic, linux-image-powerpc64-emb, linux-image-4.8.0-39-generic-lpae, linux-image-4.8.0-39-powerpc-smp, linux-image-generic, linux-image-generic-lpae, linux-raspi2, linux-image-powerpc-smp, linux-image-4.8.0-39-powerpc64-emb, linux-image-raspi2, linux-image-lowlatency
  • USN-3208-2: linux-image-4.4.0-64-powerpc64-smp, linux-image-4.4.0-64-powerpc-smp, linux-image-4.4.0-64-lowlatency, linux-lts-xenial, linux-image-4.4.0-64-powerpc-e500mc, linux-image-4.4.0-64-powerpc64-emb, linux-image-4.4.0-64-generic-lpae, linux-image-extra-4.4.0-64-generic, linux-image-4.4.0-64-generic
  • USN-3208-1: linux, linux-image-4.4.0-64-lowlatency, linux-image-4.4.0-64-powerpc-smp, linux-image-4.4.0-64-powerpc64-smp, linux-snapdragon, linux-image-4.4.0-64-powerpc-e500mc, linux-image-4.4.0-64-powerpc64-emb, linux-image-4.4.0-64-generic-lpae, linux-image-extra-4.4.0-64-generic, linux-image-4.4.0-1048-snapdragon, linux-image-4.4.0-64-generic
  • USN-3207-2: linux-image-generic-lts-trusty, linux-image-3.13.0-110-generic-lpae, linux-image-generic-lpae-lts-trusty, linux-lts-trusty, linux-image-3.13.0-110-generic