Articles / Ubuntu: Security update for…

Ubuntu: Security update for the Linux kernel

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.

Updated packages are available from security.ubuntu.com.

==========================================================================
Ubuntu Security Notice USN-1671-1
December 19, 2012

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

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

- Ubuntu 12.10

Summary:

The system could be made to crash under certain conditions.

Software Description:
- linux: Linux kernel

Details:

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.

Update instructions:

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

Ubuntu 12.10:
 linux-image-3.5.0-21-generic    3.5.0-21.32
 linux-image-3.5.0-21-highbank   3.5.0-21.32
 linux-image-3.5.0-21-omap       3.5.0-21.32
 linux-image-3.5.0-21-powerpc-smp  3.5.0-21.32
 linux-image-3.5.0-21-powerpc64-smp  3.5.0-21.32

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-1671-1
 CVE-2012-5517

Package Information:
 https://launchpad.net/ubuntu/+source/linux/3.5.0-21.32
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