USN-2095-1: Linux kernel (Saucy HWE) vulnerability

31 January 2014

linux-lts-saucy vulnerability

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

  • Ubuntu 12.04 LTS

Summary

The system could be made to crash or run programs as an administrator.

Software Description

  • linux-lts-saucy - Linux hardware enablement kernel from Saucy

Details

Pageexec reported a bug in the Linux kernel’s recvmsg syscall when called from code using the x32 ABI. An unprivileged local user could exploit this flaw to cause a denial of service (system crash) or gain administrator privileges.

Update instructions

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

Ubuntu 12.04 LTS
linux-image-3.11.0-15-generic - 3.11.0-15.25~precise1
linux-image-3.11.0-15-generic-lpae - 3.11.0-15.25~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