[USN-1486-1] Linux kernel vulnerability

John Johansen john.johansen at canonical.com
Fri Jun 29 18:09:59 UTC 2012


==========================================================================
Ubuntu Security Notice USN-1486-1
June 29, 2012

linux vulnerability
==========================================================================

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 12.04 LTS

Summary:

The system could be made to crash if it received specially crafted network
traffic.

Software Description:
- linux: Linux kernel

Details:

A flaw was discovered in the Linux kernel's NFSv4 (Network file system)
handling of ACLs (access control lists). A remote NFS server (attacker)
could cause a denial of service (OOPS).

Update instructions:

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

Ubuntu 12.04 LTS:
  linux-image-3.2.0-26-generic    3.2.0-26.41
  linux-image-3.2.0-26-generic-pae  3.2.0-26.41
  linux-image-3.2.0-26-highbank   3.2.0-26.41
  linux-image-3.2.0-26-omap       3.2.0-26.41
  linux-image-3.2.0-26-powerpc-smp  3.2.0-26.41
  linux-image-3.2.0-26-powerpc64-smp  3.2.0-26.41
  linux-image-3.2.0-26-virtual    3.2.0-26.41

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:
  http://www.ubuntu.com/usn/usn-1486-1
  CVE-2012-2375

Package Information:
  https://launchpad.net/ubuntu/+source/linux/3.2.0-26.41

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