Canonical announced yesterday, September 11th, in a security notice, that a new Linux kernel update for its Ubuntu 10.04 LTS Lucid Lynx operating system is now available, fixing two security vulnerabilities discovered by various developers in the Linux kernel packages.
As usual, you can click on it 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-2.6.32-44 (2.6.32-44.98) package(s). To apply the update, run the Update Manager application.
Don't forget to reboot your computer after the upgrade!
For detailed instructions on how to upgrade your system, see the following link: https://wiki.ubuntu.com/Security/Upgrades.