iOS 26.0.1 and iOS 18.7.1 Urgent Update Fixes FontParser Memory Flaw

iOS 26.0.1 and iOS 18.7.1 Urgent Update Fixes FontParser Memory Flaw

On September 29, 2025, Apple released security updates iOS 26.0.1 and iOS 18.7.1, accompanied by a warning urging all iPhone users to install them immediately. These updates resolve a serious vulnerability in the FontParser component—a system module responsible for processing font files—that, if exploited, could lead to application crashes or memory corruption. The flaw is tracked under CVE-2025-43400, and while Apple has not detailed every technical aspect publicly, their security writeup confirms that the patch improves bounds checking to block out-of-bounds writes. The updates span iPhones, iPads, macOS versions, and visionOS, reflecting the shared codebase underlying Apple’s operating systems. Given … Read more