USN-1968-1: Linux kernel vulnerabilities

27 September 2013

Several security issues were fixed in the kernel.

Releases

Packages

  • linux - Linux kernel

Details

Vince Weaver discovered a flaw in the perf subsystem of the Linux kernel on
ARM platforms. A local user could exploit this flaw to gain privileges or
cause a denial of service (system crash). (CVE-2013-4254)

A failure to validate block numbers was discovered in the Linux kernel's
implementation of the XFS filesystem. A local user can cause a denial of
service (system crash) if they can mount, or cause to be mounted a
corrupted or special crafted XFS filesystem. (CVE-2013-1819)

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.

Related notices

  • USN-1970-1: linux-image-3.5.0-41-generic, linux-lts-quantal
  • USN-1973-1: linux-image-3.5.0-233-omap4, linux-ti-omap4
  • USN-1975-1: linux-image-3.5.0-233-omap4, linux-ti-omap4
  • USN-1974-1: linux-image-3.8.0-31-generic, linux
  • USN-1972-1: linux-image-3.5.0-41-highbank, linux, linux-image-3.5.0-41-omap, linux-image-3.5.0-41-powerpc-smp, linux-image-3.5.0-41-powerpc64-smp, linux-image-3.5.0-41-generic
  • USN-1971-1: linux-image-3.8.0-31-generic, linux-lts-raring
  • USN-1969-1: linux-ti-omap4, linux-image-3.2.0-1438-omap4