Several security vulnerability were discovered in the Linux kernel packages, affecting many distributions, including Ubuntu 10.04 LTS, among others.These are the kernel vulnerabilities found recently in the Linux kernel packages: CVE-2011-1576, CVE-2011-1833, CVE-2011-2494, CVE-2011-2495, CVE-2011-2497, CVE-2011-2695, CVE-2011-2699, CVE-2011-2905, CVE-2011-2928, CVE-2011-3188, and CVE-2011-3191.
You can click on each one to see how it affects your Ubuntu 10.04 LTS system, or go here for an in-depth description. The security flaws can be fixed if you upgrade your system(s) to the linux-image-2.6.32-35 (2.6.32-35.78) package(s).
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.