Canonical announced on September 5th, in two different security notices, that new vulnerabilities were found in the Linux kernel packages, this time affecting its Ubuntu 10.04 LTS and Ubuntu 11.10 distributions.
The following Linux kernel vulnerability affects the Ubuntu 11.10 LTS operating system: CVE-2012-2372.
The security flaws can be fixed if you upgrade your system(s) to the linux-image-2.6.32-42.96 package(s) for Ubuntu 10.04 LTS and the linux-image-3.0.0-25.41 package(s) for Ubuntu 11.10.
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 that work with the new Linux kernel version.