A bug in banner notifications through the Messages app allows a string of characters sent via iMessage or SMS to crash an iPhone, MacRumors reports. Receiving the string of symbols and Arabic characters causes an iPhone to crash and quickly reboot after the message pops up in a notification. After the reboot, Messages will crash immediately upon opening, unless it’s being opened to the conversation containing the offending message. Even then, trying to navigate to another conversation in Messages will crash the app. Reddit users found that replying to the original message solves the problem if the Messages app opens directly to the conversation containing the offending message. But if Messages opens to the conversation list view, the app will crash when opened until another message is received.
If you can’t get someone else to send you a message, sending yourself a message through Siri or through the Share sheet in another app is an option to resolve the issue. While the character strand is very specific and unlikely to be sent by accident, a quick search proves plenty of people have already started using the message maliciously. Until Apple rolls out a fix, turning off previews for Messages will help mitigate the immediate effects of receiving the message, and if someone is repeatedly sending the message to shut down your iPhone, blocking them is always an option.