The London Stock Exchange's open-source trading platform may have been attacked, per Advanced Trading. LSE uses a trading platform called Turqoise, which is based on Linux.

The attack may have occurred on August 24, possibly originating from Russia. It affected volume trading on the exchange, especially of companies like British Telecom.

Sources suspect a larger plot of foreign enemies trying to wipe values off companies and destabilizing Western economies. Makes sense, and it would make sense to start investigating in Russia.