USN-2462-1: Linux kernel vulnerabilities

13 January 2015

Several security issues were fixed in the kernel.

Releases

Packages

  • linux - Linux kernel

Details

Andy Lutomirski discovered that the Linux kernel does not properly handle
faults associated with the Stack Segment (SS) register in the x86
architecture. A local attacker could exploit this flaw to gain
administrative privileges. (CVE-2014-9322)

Lars Bull reported a race condition in the PIT (programmable interrupt
timer) emulation in the KVM (Kernel Virtual Machine) subsystem of the Linux
kernel. A local guest user with access to PIT i/o ports could exploit this
flaw to cause a denial of service (crash) on the host. (CVE-2014-3611)

Lars Bull and Nadav Amit reported a flaw in how KVM (the Kernel Virtual
Machine) handles noncanonical writes to certain MSR registers. A privileged
guest user can exploit this flaw to cause a denial of service (kernel
panic) on the host. (CVE-2014-3610)

Update instructions

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

Ubuntu 10.04

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-2491-1: linux-ec2, linux-image-2.6.32-375-ec2
  • USN-2396-1: linux-image-3.16.0-24-lowlatency, linux-image-3.16.0-24-generic, linux-image-3.16.0-24-powerpc64-emb, linux-image-3.16.0-24-powerpc-e500mc, linux-image-3.16.0-24-powerpc64-smp, linux-image-3.16.0-24-generic-lpae, linux, linux-image-3.16.0-24-powerpc-smp
  • USN-2448-1: linux-image-3.16.0-28-generic, linux-image-3.16.0-28-generic-lpae, linux-image-3.16.0-28-powerpc-smp, linux-image-3.16.0-28-powerpc64-emb, linux-image-3.16.0-28-powerpc-e500mc, linux-image-3.16.0-28-lowlatency, linux, linux-image-3.16.0-28-powerpc64-smp
  • USN-2417-1: linux-image-3.2.0-72-generic-pae, linux-image-3.2.0-72-generic, linux-image-3.2.0-72-highbank, linux-image-3.2.0-72-powerpc64-smp, linux-image-3.2.0-72-omap, linux-image-3.2.0-72-virtual, linux-image-3.2.0-72-powerpc-smp, linux
  • USN-2418-1: linux-ti-omap4, linux-image-3.2.0-1456-omap4
  • USN-2464-1: linux-ti-omap4, linux-image-3.2.0-1458-omap4
  • USN-2394-1: linux-image-3.13.0-39-generic-lpae, linux-image-3.13.0-39-generic, linux-lts-trusty
  • USN-2395-1: linux-image-3.13.0-39-powerpc-e500, linux-image-3.13.0-39-powerpc-e500mc, linux-image-3.13.0-39-generic-lpae, linux-image-3.13.0-39-lowlatency, linux-image-3.13.0-39-generic, linux-image-3.13.0-39-powerpc-smp, linux-image-3.13.0-39-powerpc64-emb, linux-image-3.13.0-39-powerpc64-smp, linux
  • USN-2443-1: linux-image-3.2.0-74-powerpc-smp, linux-image-3.2.0-74-generic-pae, linux-image-3.2.0-74-generic, linux-image-3.2.0-74-virtual, linux-image-3.2.0-74-omap, linux-image-3.2.0-74-powerpc64-smp, linux-image-3.2.0-74-highbank, linux
  • USN-2446-1: linux-image-3.13.0-43-generic, linux-image-3.13.0-43-powerpc64-emb, linux-image-3.13.0-43-powerpc64-smp, linux-image-3.13.0-43-powerpc-e500, linux-image-3.13.0-43-powerpc-smp, linux-image-3.13.0-43-powerpc-e500mc, linux-image-3.13.0-43-generic-lpae, linux-image-3.13.0-43-lowlatency, linux
  • USN-2447-1: linux-image-3.16.0-28-generic, linux-image-3.16.0-28-generic-lpae, linux-image-3.16.0-28-powerpc-smp, linux-image-3.16.0-28-powerpc64-emb, linux-lts-utopic, linux-image-3.16.0-28-powerpc-e500mc, linux-image-3.16.0-28-lowlatency, linux-image-3.16.0-28-powerpc64-smp
  • USN-2445-1: linux-image-3.13.0-43-generic, linux-image-3.13.0-43-generic-lpae, linux-lts-trusty