4.9 - USN-2719-1

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 15.04

Summary:

The system could be made to crash under certain conditions.

Software Description: - linux: Linux kernel

Details:

Marcelo Ricardo Leitner discovered a race condition in the Linux kernel's SCTP address configuration lists when using Address Configuration Change (ASCONF) options on a socket. An unprivileged local user could exploit this flaw to cause a denial of service (system crash).

Update instructions:

The problem can be corrected by updating your system to the following package versions:

Ubuntu 15.04:
linux-image-3.19.0-26-generic 3.19.0-26.28
linux-image-3.19.0-26-generic-lpae 3.19.0-26.28
linux-image-3.19.0-26-lowlatency 3.19.0-26.28
linux-image-3.19.0-26-powerpc-e500mc 3.19.0-26.28
linux-image-3.19.0-26-powerpc-smp 3.19.0-26.28
linux-image-3.19.0-26-powerpc64-emb 3.19.0-26.28
linux-image-3.19.0-26-powerpc64-smp 3.19.0-26.28

After a standard system update you need to reboot your computer to make all the necessary changes.

ATTENTION: Due to an unavoidable ABI change the kernel updates have been given a new version number, which requires you to recompile and reinstall all third party kernel modules you might have installed. If you use linux-restricted-modules, you have to update that package as well to get modules which work with the new kernel version. Unless you manually uninstalled the standard kernel metapackages (e.g. linux-generic, linux-server, linux-powerpc), a standard system upgrade will automatically perform this as well.

References:
http://www.ubuntu.com/usn/usn-2719-1
CVE-2015-3212

Package Information:
https://launchpad.net/ubuntu/+source/linux/3.19.0-26.28