USN-3083-1: Linux kernel vulnerabilities

19 September 2016

Several security issues were fixed in the kernel.

Releases

Packages

  • linux - Linux kernel

Details

Dmitry Vyukov discovered that the IPv6 implementation in the Linux kernel
did not properly handle options data, including a use-after-free. A local
attacker could use this to cause a denial of service (system crash) or
possibly execute arbitrary code. (CVE-2016-3841)

It was discovered that a race condition existed when handling heartbeat-
timeout events in the SCTP implementation of the Linux kernel. A remote
attacker could use this to cause a denial of service. (CVE-2015-8767)

Update instructions

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

Ubuntu 14.04

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-2931-1: linux-image-3.16.0-67-powerpc64-emb, linux-image-3.16.0-67-generic-lpae, linux-lts-utopic, linux-image-3.16.0-67-powerpc64-smp, linux-image-3.16.0-67-powerpc-smp, linux-image-3.16.0-67-lowlatency, linux-image-3.16.0-67-generic, linux-image-3.16.0-67-powerpc-e500mc
  • USN-2932-1: linux-image-3.19.0-56-lowlatency, linux-image-3.19.0-56-powerpc-smp, linux-image-3.19.0-56-generic, linux-image-3.19.0-56-powerpc-e500mc, linux-lts-vivid, linux-image-3.19.0-56-generic-lpae, linux-image-3.19.0-56-powerpc64-emb, linux-image-3.19.0-56-powerpc64-smp
  • USN-3083-2: linux-lts-trusty, linux-image-3.13.0-96-generic-lpae, linux-image-3.13.0-96-generic
  • USN-2930-2: linux-image-4.2.0-34-generic-lpae, linux-image-4.2.0-34-generic, linux-image-4.2.0-34-powerpc64-emb, linux-image-4.2.0-34-powerpc-e500mc, linux-image-4.2.0-34-powerpc64-smp, linux-image-4.2.0-34-powerpc-smp, linux-lts-wily, linux-image-4.2.0-34-lowlatency
  • USN-2930-3: linux-image-4.2.0-1027-raspi2, linux-raspi2
  • USN-2967-1: linux-image-3.2.0-102-generic-pae, linux, linux-image-3.2.0-102-omap, linux-image-3.2.0-102-virtual, linux-image-3.2.0-102-generic, linux-image-3.2.0-102-powerpc-smp, linux-image-3.2.0-102-powerpc64-smp, linux-image-3.2.0-102-highbank
  • USN-2930-1: linux-image-4.2.0-34-generic-lpae, linux, linux-image-4.2.0-34-generic, linux-image-4.2.0-34-powerpc64-emb, linux-image-4.2.0-34-powerpc-e500mc, linux-image-4.2.0-34-powerpc64-smp, linux-image-4.2.0-34-powerpc-smp, linux-image-4.2.0-34-lowlatency
  • USN-2967-2: linux-ti-omap4, linux-image-3.2.0-1480-omap4