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Ubuntu Security Notice USN-1515-1

Ubuntu Security Notice USN-1515-1
Posted Jul 23, 2012
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 1515-1 - An error was discovered in the Linux kernel's memory subsystem (hugetlb). An unprivileged local user could exploit this flaw to cause a denial of service (crash the system).

tags | advisory, denial of service, kernel, local
systems | linux, ubuntu
advisories | CVE-2012-2390
MD5 | 4c532373badc98dd1d6f13513bdf91ee

Ubuntu Security Notice USN-1515-1

Change Mirror Download
============================================================================
Ubuntu Security Notice USN-1515-1
July 23, 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 under certain conditions.

Software Description:
- linux: Linux kernel

Details:

An error was discovered in the Linux kernel's memory subsystem (hugetlb).
An unprivileged local user could exploit this flaw to cause a denial of
service (crash the system).

Update instructions:

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

Ubuntu 12.04 LTS:
linux-image-3.2.0-27-generic 3.2.0-27.43
linux-image-3.2.0-27-generic-pae 3.2.0-27.43
linux-image-3.2.0-27-highbank 3.2.0-27.43
linux-image-3.2.0-27-omap 3.2.0-27.43
linux-image-3.2.0-27-powerpc-smp 3.2.0-27.43
linux-image-3.2.0-27-powerpc64-smp 3.2.0-27.43
linux-image-3.2.0-27-virtual 3.2.0-27.43

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-1515-1
CVE-2012-2390

Package Information:
https://launchpad.net/ubuntu/+source/linux/3.2.0-27.43

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