CVE-2025-43302: 
macOS vulnerability analysis and mitigation

CVE-2025-43302 is an out-of-bounds write vulnerability discovered in Apple's IOHIDFamily component, affecting multiple Apple operating systems. The vulnerability was disclosed on September 15, 2025, and was discovered by security researcher Keisuke Hosoda. The affected systems include iOS 26, iPadOS 26, macOS Sonoma 14.8, macOS Sequoia 15.7, macOS Tahoe 26, tvOS 26, visionOS 26, and watchOS 26 (Apple Support).

The vulnerability is characterized as an out-of-bounds write issue in the IOHIDFamily component that could allow an application to cause unexpected system termination. The issue was addressed by Apple through improved bounds checking implementation. The vulnerability has been assigned a CVSS 3.1 Base Score of 5.5 (MEDIUM) with the vector string CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H, indicating local access requirements and potential high impact on system availability (CISA-ADP).

When exploited, this vulnerability could allow a malicious application to cause unexpected system termination, potentially leading to denial of service conditions. The vulnerability affects a wide range of Apple devices including iPhone 11 and later, iPad Pro models, Mac computers, Apple TV, Apple Vision Pro, and Apple Watch Series 6 and later (Apple Support, Apple Support).

Apple has addressed this vulnerability by implementing improved bounds checking in the affected systems. Users are advised to update to the latest versions of their respective operating systems: iOS 26, iPadOS 26, macOS Sonoma 14.8, macOS Sequoia 15.7, macOS Tahoe 26, tvOS 26, visionOS 26, or watchOS 26 (Apple Support).