Between $150 million and $300 million in digital currency called ether remains inaccessible today after a user said he accidentally triggered a vulnerability that froze the funds in the popular Parity wallet. Parity Technologies issued an advisory warning users about the flaw in the Parity Wallet library contract affecting users with assets in a standard multi-sig contract deployed after July 20, one day after the original bug in this saga had been patched. The funds can only be accessible following a hard fork of the ethereum blockchain via an emergency update.
Source: https://threatpost.com/hundreds-of-millions-in-digital-currency-remains-frozen/128821/