Canonical announced a few minutes ago, February 12, in a security notice, that a new kernel upgrade for its Ubuntu 11.10 (Oneiric Ocelot) operating system is available, fixing four vulnerabilities found by various developers in the Linux 3.0 kernel packages.
You can click on each one to see how it affects your system, or go here for in-depth descriptions, as the issue is affecting other Linux operating systems as well.
The security flaws can be fixed if you upgrade your system(s) to the linux-image-3.0.0-31 (3.0.0-31.48) package(s). To apply the update, run the Update Manager application or follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.
Don't forget to reboot your computer after the upgrade!