USN-2619-1: Linux kernel (Trusty HWE) vulnerability

23 May 2015

linux-lts-trusty vulnerability

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

  • Ubuntu 12.04 LTS

Summary

The system could be made to crash under certain conditions.

Software Description

  • linux-lts-trusty - Linux hardware enablement kernel from Trusty

Details

A flaw was discovered in the Linux kernel’s IPv4 networking when using TCP fast open to initiate a connection. 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 12.04 LTS
linux-image-3.13.0-53-generic - 3.13.0-53.89~precise1
linux-image-3.13.0-53-generic-lpae - 3.13.0-53.89~precise1

To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.

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

References