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USN-2240-1: Linux kernel vulnerabilities

5 June 2014

Several security issues were fixed in the kernel.




Pinkie Pie discovered a flaw in the Linux kernel's futex subsystem. An
unprivileged local user could exploit this flaw to cause a denial of
service (system crash) or gain administrative privileges. (CVE-2014-3153)

An information leak was discovered in the netfilter subsystem of the Linux
kernel. An attacker could exploit this flaw to obtain sensitive information
from kernel memory. (CVE-2014-2568)

Sasha Levin reported a bug in the Linux kernel's virtual memory management
subsystem. An unprivileged local user could exploit this flaw to cause a
denial of service (system crash). (CVE-2014-3122)

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. 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-2260-1: linux-image-3.13.0-30-generic, linux-image-3.13.0-30-generic-lpae, linux-lts-trusty
  • USN-2239-1: linux-image-3.11.0-23-generic, linux-image-3.11.0-23-generic-lpae, linux-lts-saucy
  • USN-2241-1: linux-image-3.11.0-23-generic, linux, linux-image-3.11.0-23-generic-lpae
  • USN-2235-1: linux-image-3.2.0-64-virtual, linux-image-3.2.0-64-powerpc64-smp, linux-image-3.2.0-64-powerpc-smp, linux-image-3.2.0-64-generic-pae, linux-image-3.2.0-64-generic, linux-image-3.2.0-64-highbank, linux-image-3.2.0-64-omap, linux
  • USN-2236-1: linux-image-3.2.0-1449-omap4, linux-ti-omap4
  • USN-2223-1: linux-image-3.5.0-51-generic, linux-lts-quantal
  • USN-2224-1: linux-lts-raring, linux-image-3.8.0-41-generic
  • USN-2234-1: linux-ec2, linux-image-2.6.32-365-ec2
  • USN-2233-1: linux-image-2.6.32-61-generic, linux-image-2.6.32-61-lpia, linux-image-2.6.32-61-sparc64, linux-image-2.6.32-61-powerpc-smp, linux-image-2.6.32-61-virtual, linux-image-2.6.32-61-preempt, linux-image-2.6.32-61-ia64, linux-image-2.6.32-61-powerpc, linux-image-2.6.32-61-generic-pae, linux-image-2.6.32-61-powerpc64-smp, linux-image-2.6.32-61-sparc64-smp, linux-image-2.6.32-61-versatile, linux-image-2.6.32-61-server, linux-image-2.6.32-61-386, linux
  • USN-2237-1: linux-image-3.5.0-51-generic, linux-lts-quantal
  • USN-2238-1: linux-image-3.8.0-42-generic, linux-lts-raring