For details on the issues addressed with this update, please visit the referenced security advisories.
Solution: The problem can be corrected by upgrading the affected package to version 2.6.8.1-16.28 (for Ubuntu 4.10), 2.6.10-34.12 (for Ubuntu 5.04), or 2.6.12-10.30 (for Ubuntu 5.10). After a standard system upgrade you need to reboot your machine to effect the necessary changes.