A security vulnerability that was discovered in the Linux kernel, affecting the Ubuntu 12.10 (Quantal Quetzal) operating system, has been announced by Canonical.
fixed vulnerabilities in the Linux kernel, but it also introduced a regression. Due to an unrelated regression, inotify/fanotify stopped working after upgrading. This update fixes the problem.
The security flaws can be fixed if you upgrade your system(s) to the linux-image-3.5.0-23 (3.5.0-23.35).
Don't forget to reboot your computer after the upgrade!
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.