USN-1515-1: Linux kernel vulnerability

23 July 2012

The system could be made to crash under certain conditions.

Releases

Packages

  • linux - Linux kernel

Details

An error was discovered in the Linux kernel's memory subsystem (hugetlb).
An unprivileged local user could exploit this flaw to cause a denial of
service (crash the system).

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.

References

Related notices

  • USN-1508-1: linux-ti-omap4, linux-image-3.2.0-1416-omap4
  • USN-1531-1: linux-image-2.6.38-15-powerpc, linux-image-2.6.38-15-powerpc64-smp, linux-image-2.6.38-15-versatile, linux-image-2.6.38-15-omap, linux-image-2.6.38-15-powerpc-smp, linux-image-2.6.38-15-server, linux-image-2.6.38-15-virtual, linux, linux-image-2.6.38-15-generic, linux-image-2.6.38-15-generic-pae
  • USN-1533-1: linux-image-3.0.0-24-virtual, linux-image-3.0.0-24-server, linux-image-3.0.0-24-generic, linux-image-3.0.0-24-powerpc-smp, linux, linux-image-3.0.0-24-omap, linux-image-3.0.0-24-powerpc64-smp, linux-image-3.0.0-24-generic-pae, linux-image-3.0.0-24-powerpc
  • USN-1534-1: linux-ec2, linux-image-2.6.32-347-ec2
  • USN-1535-1: linux-image-2.6.32-42-preempt, linux-image-2.6.32-42-generic, linux-image-2.6.32-42-generic-pae, linux-image-2.6.32-42-powerpc64-smp, linux-image-2.6.32-42-server, linux-image-2.6.32-42-386, linux-image-2.6.32-42-lpia, linux-image-2.6.32-42-sparc64-smp, linux-image-2.6.32-42-ia64, linux, linux-image-2.6.32-42-powerpc, linux-image-2.6.32-42-versatile, linux-image-2.6.32-42-virtual, linux-image-2.6.32-42-powerpc-smp, linux-image-2.6.32-42-sparc64
  • USN-1538-1: linux-image-2.6.38-15-server, linux-image-2.6.38-15-virtual, linux-image-2.6.38-15-generic, linux-image-2.6.38-15-generic-pae, linux-lts-backport-natty
  • USN-1539-1: linux-image-3.0.0-24-virtual, linux-image-3.0.0-24-server, linux-image-3.0.0-24-generic, linux-lts-backport-oneiric, linux-image-3.0.0-24-generic-pae