Canonical announced a few hours ago, June 13th, in a security notice, that a new Linux kernel update for its Ubuntu 12.04 LTS (Precise Pangolin) operating system is now available, fixing six security vulnerabilities discovered in the Linux kernel packages by various developers.
As usual, you can click on each one to see how it affects your system, or go here for in-depth descriptions, as it affects other Linux operating systems as well.
The security flaws can be fixed if you upgrade your system(s) to the linux-image-3.2.0-25 (3.2.0-25.40) package(s). To apply the update, run the Update Manager application.
Don't forget to reboot your computer after the upgrade!
ATTENTION: Due to an unavoidable ABI change, the kernel packages have a new version number, which will force you to reinstall and recompile all third-party kernel modules you might have installed. Moreover, if you use the linux-restricted-modules package, you have to update it as well to get modules which work with the new Linux kernel version.