USN-3786-1: libxkbcommon vulnerabilities

8 October 2018

libxkbcommon vulnerabilities

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

  • Ubuntu 16.04 LTS
  • Ubuntu 14.04 LTS


Several security issues were fixed in libxkbcommon.

Software Description

  • libxkbcommon - library interface to the XKB compiler - development files


It was discovered that libxkbcommon incorrectly handled certain files. An attacker could possibly use this issue to cause a denial of service. (CVE-2018-15853, CVE-2018-15854, CVE-2018-15855, CVE-2018-15856, CVE-2018-15857, CVE-2018-15858, CVE-2018-15859, CVE-2018-15861, CVE-2018-15862, CVE-2018-15863, CVE-2018-15864)

Update instructions

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

Ubuntu 16.04 LTS
libxkbcommon-x11-0 - 0.5.0-1ubuntu2.1
libxkbcommon0 - 0.5.0-1ubuntu2.1
Ubuntu 14.04 LTS
libxkbcommon-x11-0 - 0.4.1-0ubuntu1.1
libxkbcommon0 - 0.4.1-0ubuntu1.1

To update your system, please follow these instructions:

In general, a standard system update will make all the necessary changes.