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USN-1507-1: Linux kernel vulnerabilities

17 July 2012

Several security issues were fixed in the kernel.




A flaw was found in the Linux kernel's KVM (Kernel Virtual Machine) virtual
cpu setup. An unprivileged local user could exploit this flaw to crash the
system leading to a denial of service. (CVE-2012-1601)

An error was found in the Linux kernel's IPv6 netfilter when connection
tracking is enabled. A remote attacker could exploit this flaw to crash a
system if it is using IPv6 with the nf_contrack_ipv6 kernel module loaded.

Update instructions

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

Ubuntu 8.04

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-1453-1: linux-ec2, linux-image-2.6.32-345-ec2
  • USN-1457-1: linux-image-2.6.38-15-powerpc, linux-image-2.6.38-15-versatile, linux-image-2.6.38-15-powerpc64-smp, linux-image-2.6.38-15-generic, linux-image-2.6.38-15-omap, linux, linux-image-2.6.38-15-virtual, linux-image-2.6.38-15-powerpc-smp, linux-image-2.6.38-15-server, linux-image-2.6.38-15-generic-pae
  • USN-1452-1: linux-image-3.0.0-20-powerpc, linux-image-3.0.0-20-generic, linux-image-3.0.0-20-generic-pae, linux-image-3.0.0-20-powerpc-smp, linux-image-3.0.0-20-server, linux, linux-image-3.0.0-20-virtual, linux-image-3.0.0-20-powerpc64-smp, linux-image-3.0.0-20-omap
  • USN-1470-1: linux-image-2.6.38-15-generic, linux-image-2.6.38-15-virtual, linux-image-2.6.38-15-server, linux-lts-backport-natty, linux-image-2.6.38-15-generic-pae
  • USN-1448-1: linux-image-3.2.0-24-powerpc-smp, linux-image-3.2.0-24-omap, linux-image-3.2.0-24-powerpc64-smp, linux-image-3.2.0-24-virtual, linux-image-3.2.0-24-generic-pae, linux-image-3.2.0-24-generic, linux
  • USN-1459-1: linux-ti-omap4, linux-image-3.0.0-1210-omap4
  • USN-1460-1: linux-ti-omap4, linux-image-3.2.0-1413-omap4
  • USN-1455-1: linux-image-3.0.0-20-generic, linux-lts-backport-oneiric, linux-image-3.0.0-20-generic-pae, linux-image-3.0.0-20-server, linux-image-3.0.0-20-virtual
  • USN-1445-1: linux-image-2.6.32-41-powerpc-smp, linux-image-2.6.32-41-versatile, linux-image-2.6.32-41-powerpc64-smp, linux-image-2.6.32-41-sparc64, linux-image-2.6.32-41-ia64, linux-image-2.6.32-41-generic, linux-image-2.6.32-41-powerpc, linux-image-2.6.32-41-server, linux-image-2.6.32-41-virtual, linux-image-2.6.32-41-lpia, linux-image-2.6.32-41-sparc64-smp, linux, linux-image-2.6.32-41-preempt, linux-image-2.6.32-41-generic-pae, linux-image-2.6.32-41-386