Quake 3 engine, as used in multiple games, allows remote attackers to cause a denial of service (client disconnect) via a long message, which is not properly truncated and causes the engine to process the remaining data as if it were network data.

Quake 2 server 3.13 on Linux does not properly check file permissions for the config.cfg configuration file, which allows local users to read arbitrary files via a symlink from config.cfg to the target file.