Canonical has provided a security update to protect users of the Ubuntu 16.04 LTS Xenial Xerus operating system.
According to Ubuntu security bulletin USN-3016-1, a total of seven vulnerabilities in Linux kernel 4.4 LTS have been patched by various developers. So Canonical updates the kernel packages for Xenial Xerus' Ubuntu 16.04 LTS with the release of versions linux-image-4.4.0-28 (4.4.0-28.47).
Among the patches, we can mention issues validation with the Linux kernel netfilter implementation, a leakage information on the USB core implementation, and many others.
Ubuntu Security Notice USN-3016-1
Topics affect Ubuntu 16.04 LTS and all its official derivatives, such as Kubuntu 16.04 LTS, Xubuntu 16.04 LTS, Ubuntu 16.04 LTS, Ubuntu 16.04 LTS, Ubuntu 16.04 LTS, Ubuntu 16.04 LTS, Ubuntu 16.04 LTS and Ubuntu XNUMX LTS.
If you are using the Ubuntu 16.04 LTS Xenial Xerus operating system Canonical urges you to update as soon as possible. The new kernel version, linux-image-4.4.0-28 (4.4.0-28.47), already exists in major software repositories. To update, open the software upgrade utility from Dash and apply all available updates by clicking the "Install All" button.
Please note that Canonical reports that all issues that have become patched in the Ubuntu 16.04 LTS Xenial Xerus core kernel packages also affect Ubuntu 15.10 users.
So Ubuntu 15.10 users should update their systems with linux-image-4.2.0-41 (4.2.0-41.48) as soon as possible. Users of Ubuntu 14.04 LTS are also affected.