CVE-2025-43211 is a vulnerability in Apple operating systems where processing web content may lead to a denial-of-service condition due to improper memory handling. The issue has been addressed with improved memory management in several Apple OS versions including macOS Sequoia 15.6, iPadOS 17.7.9, iOS 18.6, tvOS 18.6, watchOS 11.6, and visionOS 2.6.