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USN-2274-1: Linux kernel vulnerability

5 July 2014

The system could be made to crash or run programs as an administrator.




Andy Lutomirski discovered a flaw with the Linux kernel's ptrace syscall on
x86_64 processors. An attacker could exploit this flaw to cause a denial of
service (System Crash) or potential gain administrative privileges.

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-2270-1: linux-lts-raring, linux-image-3.8.0-42-generic
  • USN-2266-1: linux-image-2.6.32-62-preempt, linux-image-2.6.32-62-ia64, linux-image-2.6.32-62-lpia, linux-image-2.6.32-62-powerpc64-smp, linux, linux-image-2.6.32-62-sparc64, linux-image-2.6.32-62-virtual, linux-image-2.6.32-62-generic, linux-image-2.6.32-62-386, linux-image-2.6.32-62-powerpc-smp, linux-image-2.6.32-62-versatile, linux-image-2.6.32-62-generic-pae, linux-image-2.6.32-62-sparc64-smp, linux-image-2.6.32-62-server, linux-image-2.6.32-62-powerpc
  • USN-2269-1: linux-image-3.5.0-52-generic, linux-lts-quantal
  • USN-2271-1: linux-lts-saucy, linux-image-3.11.0-24-generic, linux-image-3.11.0-24-generic-lpae
  • USN-2272-1: linux-image-3.13.0-30-generic-lpae, linux-image-3.13.0-30-generic, linux-lts-trusty
  • USN-2267-1: linux-image-2.6.32-366-ec2, linux-ec2
  • USN-2273-1: linux-image-3.11.0-24-generic, linux-image-3.11.0-24-generic-lpae, linux
  • USN-2268-1: linux-image-3.2.0-65-generic, linux-image-3.2.0-65-generic-pae, linux, linux-image-3.2.0-65-omap, linux-image-3.2.0-65-virtual, linux-image-3.2.0-65-powerpc-smp, linux-image-3.2.0-65-powerpc64-smp, linux-image-3.2.0-65-highbank
  • USN-2284-1: linux-image-3.2.0-1451-omap4, linux-ti-omap4