Your submission was sent successfully! Close

You have successfully unsubscribed! Close

USN-1422-1: Linux kernel vulnerabilities

12 April 2012

Several security issues were fixed in the kernel.

Reduce your security exposure

Ubuntu Pro provides ten-year security coverage to 25,000+ packages in Main and Universe repositories, and it is free for up to five machines.

Learn more about Ubuntu Pro

Releases

Packages

Details

Sasha Levin discovered a flaw in the permission checking for device
assignments requested via the kvm ioctl in the Linux kernel. A local user
could use this flaw to crash the system causing a denial of service.
(CVE-2011-4347)

Stephan Bärwolf discovered a flaw in the KVM (kernel-based virtual
machine) subsystem of the Linux kernel. A local unprivileged user can crash
use this flaw to crash VMs causing a deny of service. (CVE-2012-0045)

H. Peter Anvin reported a flaw in the Linux kernel that could crash the
system. A local user could exploit this flaw to crash the system.
(CVE-2012-1097)

A flaw was discovered in the Linux kernel's cgroups subset. A local
attacker could use this flaw to crash the system. (CVE-2012-1146)

Reduce your security exposure

Ubuntu Pro provides ten-year security coverage to 25,000+ packages in Main and Universe repositories, and it is free for up to five machines.

Learn more about Ubuntu Pro

Update instructions

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

Ubuntu 11.04

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-1440-1: linux-image-2.6.38-15-generic-pae, linux-image-2.6.38-15-server, linux-lts-backport-natty, linux-image-2.6.38-15-generic, linux-image-2.6.38-15-virtual
  • USN-1421-1: linux-lts-backport-maverick, linux-image-2.6.35-32-virtual, linux-image-2.6.35-32-generic, linux-image-2.6.35-32-server, linux-image-2.6.35-32-generic-pae
  • USN-1425-1: linux-image-2.6.32-41-sparc64-smp, linux-image-2.6.32-41-versatile, linux-image-2.6.32-41-powerpc, linux-image-2.6.32-41-server, linux-image-2.6.32-41-sparc64, linux, linux-image-2.6.32-41-generic, linux-image-2.6.32-41-lpia, linux-image-2.6.32-41-powerpc-smp, linux-image-2.6.32-41-virtual, linux-image-2.6.32-41-ia64, linux-image-2.6.32-41-preempt, linux-image-2.6.32-41-generic-pae, linux-image-2.6.32-41-386, linux-image-2.6.32-41-powerpc64-smp
  • USN-1433-1: linux-image-3.0.0-19-virtual, linux-lts-backport-oneiric, linux-image-3.0.0-19-generic-pae, linux-image-3.0.0-19-generic, linux-image-3.0.0-19-server
  • USN-1446-1: linux-ti-omap4, linux-image-3.0.0-1209-omap4
  • USN-1431-1: linux-image-3.0.0-19-virtual, linux-image-3.0.0-19-powerpc-smp, linux-image-3.0.0-19-powerpc64-smp, linux, linux-image-3.0.0-19-powerpc, linux-image-3.0.0-19-omap, linux-image-3.0.0-19-generic-pae, linux-image-3.0.0-19-generic, linux-image-3.0.0-19-server
  • USN-1426-1: linux-ec2, linux-image-2.6.32-345-ec2
  • USN-1458-1: linux-ti-omap4, linux-image-2.6.38-1209-omap4