During development work for an international news feed, software engineers at Aloha Browser
found two Unicode symbols in a language that can crash any Apple device that uses Apple’s default San Francisco Font, as reported by TechCrunch.
The bug induces crashes on iPhones, iPads, Macs and even Watch OS devices that show content containing the image on their screens. When one of the two images is shown in an application, it causes the software to crash. The application can’t be reopened and must be installed again.
The bug crashes applications including Mail, Twitter, Messages, Slack, Instagram, and Facebook.
TechCrunch also tested Jumpcut and Chrome and reported that both crashed on displaying the symbol.
Apple has confirmed that a fix is coming soon and that this issue only affects current software versions and has already been resolved in the current betas of iOS, watchOS, macOS and tvOS.