Ubuntu Security Notice USN-138-1 – A format string vulnerability has been discovered in gedit. Calling the program with specially crafted file names caused a buffer overflow, which could be exploited to execute arbitrary code with the privileges of the gedit user.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/38144/USN-138-1.txt
Source: https://packetstormsecurity.com/files/38144/Ubuntu-Security-Notice-138-1.html