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USN-1606-1: Linux kernel vulnerabilities

11 October 2012

Several security issues were fixed in the kernel.

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Releases

Packages

Details

A flaw was found in how the Linux kernel's KVM (Kernel-based Virtual
Machine) subsystem handled MSI (Message Signaled Interrupts). A local
unprivileged user could exploit this flaw to cause a denial of service or
potentially elevate privileges. (CVE-2012-2137)

A flaw was found in how the Linux kernel passed the replacement session
keyring to a child process. An unprivileged local user could exploit this
flaw to cause a denial of service (panic). (CVE-2012-2745)

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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.

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Update instructions

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

Ubuntu 10.04

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-1607-1: linux, linux-image-3.0.0-26-powerpc, linux-image-3.0.0-26-powerpc-smp, linux-image-3.0.0-26-omap, linux-image-3.0.0-26-server, linux-image-3.0.0-26-virtual, linux-image-3.0.0-26-powerpc64-smp, linux-image-3.0.0-26-generic-pae, linux-image-3.0.0-26-generic
  • USN-1594-1: linux-lts-backport-oneiric, linux-image-3.0.0-26-server, linux-image-3.0.0-26-virtual, linux-image-3.0.0-26-generic-pae, linux-image-3.0.0-26-generic
  • USN-1529-1: linux-image-3.2.0-29-highbank, linux-image-3.2.0-29-virtual, linux-image-3.2.0-29-powerpc64-smp, linux, linux-image-3.2.0-29-powerpc-smp, linux-image-3.2.0-29-omap, linux-image-3.2.0-29-generic, linux-image-3.2.0-29-generic-pae
  • USN-1514-1: linux-ti-omap4, linux-image-3.2.0-1417-omap4
  • USN-1609-1: linux-image-3.0.0-1216-omap4, linux-ti-omap4
  • USN-1574-1: linux-image-2.6.38-16-virtual, linux-image-2.6.38-16-server, linux-image-2.6.38-16-generic, linux-lts-backport-natty, linux-image-2.6.38-16-generic-pae
  • USN-1452-1: linux-image-3.0.0-20-powerpc64-smp, linux-image-3.0.0-20-powerpc, linux-image-3.0.0-20-omap, linux-image-3.0.0-20-powerpc-smp, linux, linux-image-3.0.0-20-generic, linux-image-3.0.0-20-server, linux-image-3.0.0-20-virtual, linux-image-3.0.0-20-generic-pae
  • USN-1448-1: linux, linux-image-3.2.0-24-virtual, linux-image-3.2.0-24-generic, linux-image-3.2.0-24-powerpc-smp, linux-image-3.2.0-24-omap, linux-image-3.2.0-24-generic-pae, linux-image-3.2.0-24-powerpc64-smp
  • USN-1459-1: linux-image-3.0.0-1210-omap4, linux-ti-omap4
  • USN-1460-1: linux-ti-omap4, linux-image-3.2.0-1413-omap4
  • USN-1597-1: linux-image-2.6.32-349-ec2, linux-ec2
  • USN-1455-1: linux-image-3.0.0-20-server, linux-image-3.0.0-20-generic, linux-lts-backport-oneiric, linux-image-3.0.0-20-virtual, linux-image-3.0.0-20-generic-pae
  • USN-1567-1: linux, linux-image-2.6.38-16-powerpc64-smp, linux-image-2.6.38-16-versatile, linux-image-2.6.38-16-virtual, linux-image-2.6.38-16-server, linux-image-2.6.38-16-generic, linux-image-2.6.38-16-powerpc-smp, linux-image-2.6.38-16-powerpc, linux-image-2.6.38-16-omap, linux-image-2.6.38-16-generic-pae

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Further reading