USN-2463-1: Linux kernel vulnerabilities

13 January 2015

Several security issues were fixed in the kernel.

Releases

Packages

  • linux - Linux kernel

Details

A race condition with MMIO and PIO transactions in the KVM (Kernel Virtual
Machine) subsystem of the Linux kernel was discovered. A guest OS user
could exploit this flaw to cause a denial of service (guest OS crash) via a
specially crafted application. (CVE-2014-7842)

The KVM (kernel virtual machine) subsystem of the Linux kernel
miscalculates the number of memory pages during the handling of a mapping
failure. A guest OS user could exploit this to cause a denial of service
(host OS page unpinning) or possibly have unspecified other impact by
leveraging guest OS privileges. (CVE-2014-8369)

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. If
you use linux-restricted-modules, you have to update that package as
well to get modules which work with the new kernel version. Unless you
manually uninstalled the standard kernel metapackages (e.g. linux-generic,
linux-server, linux-powerpc), a standard system upgrade will automatically
perform this as well.

Related notices

  • USN-2466-1: linux-image-3.13.0-44-powerpc-e500mc, linux-image-3.13.0-44-generic-lpae, linux-image-3.13.0-44-powerpc-e500, linux-image-3.13.0-44-powerpc64-smp, linux, linux-image-3.13.0-44-powerpc64-emb, linux-image-3.13.0-44-lowlatency, linux-image-3.13.0-44-powerpc-smp, linux-image-3.13.0-44-generic
  • USN-2448-1: linux-image-3.16.0-28-lowlatency, linux-image-3.16.0-28-powerpc64-emb, linux-image-3.16.0-28-powerpc64-smp, linux, linux-image-3.16.0-28-generic-lpae, linux-image-3.16.0-28-powerpc-smp, linux-image-3.16.0-28-powerpc-e500mc, linux-image-3.16.0-28-generic
  • USN-2465-1: linux-lts-trusty, linux-image-3.13.0-44-generic, linux-image-3.13.0-44-generic-lpae
  • USN-2467-1: linux-image-3.16.0-29-powerpc64-smp, linux-image-3.16.0-29-generic, linux-lts-utopic, linux-image-3.16.0-29-generic-lpae, linux-image-3.16.0-29-powerpc-smp, linux-image-3.16.0-29-powerpc-e500mc, linux-image-3.16.0-29-lowlatency, linux-image-3.16.0-29-powerpc64-emb
  • USN-2468-1: linux-image-3.16.0-29-powerpc64-smp, linux-image-3.16.0-29-generic, linux-image-3.16.0-29-generic-lpae, linux, linux-image-3.16.0-29-powerpc-smp, linux-image-3.16.0-29-powerpc-e500mc, linux-image-3.16.0-29-lowlatency, linux-image-3.16.0-29-powerpc64-emb
  • USN-2464-1: linux-ti-omap4, linux-image-3.2.0-1458-omap4
  • USN-2446-1: linux-image-3.13.0-43-generic-lpae, linux-image-3.13.0-43-lowlatency, linux-image-3.13.0-43-powerpc64-emb, linux-image-3.13.0-43-powerpc-smp, linux-image-3.13.0-43-powerpc64-smp, linux, linux-image-3.13.0-43-powerpc-e500, linux-image-3.13.0-43-powerpc-e500mc, linux-image-3.13.0-43-generic
  • USN-2447-1: linux-image-3.16.0-28-lowlatency, linux-image-3.16.0-28-powerpc64-emb, linux-lts-utopic, linux-image-3.16.0-28-powerpc64-smp, linux-image-3.16.0-28-generic-lpae, linux-image-3.16.0-28-powerpc-smp, linux-image-3.16.0-28-powerpc-e500mc, linux-image-3.16.0-28-generic
  • USN-2445-1: linux-lts-trusty, linux-image-3.13.0-43-generic-lpae, linux-image-3.13.0-43-generic