X.org X server 1.13.3 and earlier, when not run as root, allows local users to cause a denial of service (crash) or possibly gain privileges via vectors involving cached xkb files.
http://www.ubuntu.com/usn/USN-1990-1
Source: Mitre, NVD
Published: 2013-10-28
Base Score: 1.9
Vector: CVSS2#AV:L/AC:M/Au:N/C:N/I:N/A:P
Severity: Low