Apple has released iOS 11.2.6, watchOS 4.2.3, and tvOS 11.2.6 with fixes to CoreText wherein a Telugu character could crash text apps.

Apple addressed a memory corruption issue via improved input validation.

iOS 11.2.6, watchOS 4.2.3, and tvOS 11.2.6 are available via the OSes’ Software Update mechanisms.

SEE ALSO:
Apple releases macOS 10.13.3 Supplemental Update with Telugu text bug fix – February 20, 2018
How to fix the Indian character bug on iPhone and iPad – February 16, 2018
Major new iOS bug can crash iPhones and disable access to Messages and other apps – February 15, 2018
ChaiOS ‘text bomb’ can crash your Apple iPhone or Mac with a single link – January 17, 2018
Three-character message prank crashes pre-iOS 10.2 Apple iPhones with a single text – January 18, 2017
Random string of Arabic characters can crash nearly any Mac, iPhone or iPad – September 3, 2013