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USN-1671-1: Linux kernel vulnerability

19 December 2012

The system could be made to crash under certain conditions.

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Releases

Packages

Details

Dmitry Monakhov reported a race condition flaw the Linux ext4 filesystem
that can expose stale data. An unprivileged user could exploit this flaw to
cause an information leak. (CVE-2012-4508)

A flaw was discovered in the Linux kernel's handling of new hot-plugged
memory. An unprivileged local user could exploit this flaw to cause a
denial of service by crashing the system. (CVE-2012-5517)

An information leak was discovered in the Linux kernel's /dev/dvb device. A
local user could exploit this flaw to obtain sensitive information from the
kernel's stack memory. (CVE-2013-1928)

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 12.10

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-1644-1: linux-image-3.2.0-34-generic-pae, linux-image-3.2.0-34-omap, linux-image-3.2.0-34-powerpc64-smp, linux-image-3.2.0-34-virtual, linux-image-3.2.0-34-powerpc-smp, linux-image-3.2.0-34-highbank, linux-image-3.2.0-34-generic, linux
  • USN-1719-1: linux-image-3.0.0-31-server, linux-lts-backport-oneiric, linux-image-3.0.0-31-generic, linux-image-3.0.0-31-virtual, linux-image-3.0.0-31-generic-pae
  • USN-1900-1: linux-image-2.6.32-354-ec2, linux-ec2
  • USN-1645-1: linux-ti-omap4, linux-image-3.2.0-1422-omap4
  • USN-1704-1: linux-lts-quantal, linux-image-3.5.0-22-generic
  • USN-1673-1: linux-image-3.5.0-216-omap4, linux-ti-omap4
  • USN-1720-1: linux-image-3.0.0-31-server, linux-image-3.0.0-31-powerpc64-smp, linux-image-3.0.0-31-generic, linux-image-3.0.0-31-virtual, linux-image-3.0.0-31-omap, linux-image-3.0.0-31-powerpc, linux-image-3.0.0-31-generic-pae, linux-image-3.0.0-31-powerpc-smp, linux
  • USN-1726-1: linux-ti-omap4, linux-image-3.0.0-1221-omap4
  • USN-1899-1: linux-image-2.6.32-49-sparc64, linux-image-2.6.32-49-powerpc64-smp, linux-image-2.6.32-49-ia64, linux-image-2.6.32-49-generic, linux-image-2.6.32-49-powerpc-smp, linux-image-2.6.32-49-server, linux-image-2.6.32-49-versatile, linux-image-2.6.32-49-sparc64-smp, linux-image-2.6.32-49-preempt, linux-image-2.6.32-49-386, linux, linux-image-2.6.32-49-powerpc, linux-image-2.6.32-49-virtual, linux-image-2.6.32-49-lpia, linux-image-2.6.32-49-generic-pae
  • USN-1679-1: linux-ti-omap4, linux-image-3.0.0-1219-omap4
  • USN-1678-1: linux-lts-backport-oneiric, linux-image-3.0.0-29-virtual, linux-image-3.0.0-29-generic-pae, linux-image-3.0.0-29-generic, linux-image-3.0.0-29-server
  • USN-1670-1: linux-ti-omap4, linux-image-3.2.0-1423-omap4
  • USN-1677-1: linux-image-3.0.0-29-virtual, linux-image-3.0.0-29-omap, linux-image-3.0.0-29-generic-pae, linux-image-3.0.0-29-generic, linux-image-3.0.0-29-powerpc64-smp, linux-image-3.0.0-29-powerpc, linux-image-3.0.0-29-server, linux, linux-image-3.0.0-29-powerpc-smp
  • USN-1669-1: linux-image-3.2.0-35-powerpc64-smp, linux-image-3.2.0-35-omap, linux-image-3.2.0-35-generic-pae, linux-image-3.2.0-35-virtual, linux, linux-image-3.2.0-35-powerpc-smp, linux-image-3.2.0-35-highbank, linux-image-3.2.0-35-generic
  • USN-1648-1: linux-image-3.0.0-28-powerpc-smp, linux-image-3.0.0-28-generic, linux-image-3.0.0-28-server, linux-image-3.0.0-28-powerpc64-smp, linux-image-3.0.0-28-virtual, linux-image-3.0.0-28-omap, linux-image-3.0.0-28-powerpc, linux-image-3.0.0-28-generic-pae, linux
  • USN-1649-1: linux-ti-omap4, linux-image-3.0.0-1218-omap4
  • USN-1829-1: linux-image-2.6.32-352-ec2, linux-ec2
  • USN-1824-1: linux-image-2.6.32-47-powerpc64-smp, linux-image-2.6.32-47-server, linux-image-2.6.32-47-sparc64, linux-image-2.6.32-47-ia64, linux-image-2.6.32-47-sparc64-smp, linux-image-2.6.32-47-versatile, linux-image-2.6.32-47-virtual, linux-image-2.6.32-47-preempt, linux-image-2.6.32-47-generic, linux-image-2.6.32-47-powerpc, linux-image-2.6.32-47-powerpc-smp, linux-image-2.6.32-47-generic-pae, linux, linux-image-2.6.32-47-lpia, linux-image-2.6.32-47-386
  • USN-1652-1: linux-lts-backport-oneiric, linux-image-3.0.0-28-generic, linux-image-3.0.0-28-virtual, linux-image-3.0.0-28-generic-pae, linux-image-3.0.0-28-server