This vulnerability involves an integer overflow that could be triggered by a malicious app, leading to unexpected system termination on affected Apple platforms including iOS and iPadOS. Apple fixed the issue by improving input validation in iOS 26.6 and iPadOS 26.6, as well as in other related operating systems. The CVSS 3.1 base score of 9.8 reflects the critical nature of this flaw, with network attack vector, low attack complexity, no privileges or user interaction required, and high impact on confidentiality, integrity, and availability.

An attacker controlling a malicious app could exploit this integer overflow to cause unexpected system termination, potentially leading to denial of service and disruption of device availability. The vulnerability affects confidentiality, integrity, and availability as per the CVSS vector, though no known exploits are reported in the wild at this time.

A fix is available in iOS 26.6 and iPadOS 26.6. Users and administrators should update affected devices to these versions or later to remediate this vulnerability. No additional mitigation steps are indicated by the vendor advisory.