This vulnerability (CVE-2026-43814) is a use-after-free flaw (CWE-416) in Apple iOS and iPadOS that could be exploited by a malicious app to cause unexpected system termination, potentially leading to denial of service or other impacts. The issue was addressed by Apple through improved memory management. The fix is included in iOS 26.6 and iPadOS 26.6, as well as corresponding updates for macOS Tahoe, tvOS, and watchOS. The CVSS v3.1 base score is 9.8, indicating a critical severity with network attack vector, low attack complexity, no privileges required, no user interaction, and high impact on confidentiality, integrity, and availability.

Exploitation of this vulnerability allows an unprivileged app to cause unexpected system termination, which can lead to denial of service and potentially compromise system stability. The high CVSS score reflects the critical nature of the impact on confidentiality, integrity, and availability.

Apple has fixed this vulnerability in iOS 26.6 and iPadOS 26.6. Users and administrators should update affected devices to these versions or later to remediate the issue. No additional mitigation steps are indicated or required beyond applying the official update.