https://www.helpnetsecurity.com/2009/07/31/iphone-os-301-fixes-sms-security-issue/
iPhone OS 3.0.1 fixes SMS security issue - Help Net Security
May 28, 2020 - As we learned this week at Black Hat, a memory corruption issue exists in the decoding of SMS messages and receiving a maliciously crafted SMS message may
iphone os 3 0 1sms security