CVE-2025-43216 is a use-after-free vulnerability in Safari that could cause the browser to crash when processing maliciously crafted web content. The issue was addressed through improved memory management and fixed in multiple Apple operating system versions including watchOS 11.6, iOS 18.6, iPadOS 18.6 and 17.7.9, tvOS 18.6, macOS Sequoia 15.6, and visionOS 2.6.