CVE-2026-84615 in iOS
Summary
by MITRE • 09/15/2026
An authorization issue was addressed with improved state management. This issue is fixed in iOS 26.7 and iPadOS 26.7, iOS 27 and iPadOS 27, tvOS 27, visionOS 27. An app may be able to access sensitive user data.
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Analysis
by VulDB Data Team • 09/15/2026
The vulnerability described represents a critical authorization flaw rooted in improper state management within the operating system's application execution environment. In complex software architectures, particularly those involving mobile and wearable devices like iOS, iPadOS, tvOS, and visionOS, maintaining consistent security states during transitions between different privilege levels or user contexts is paramount. When an application undergoes changes to its internal state, such as switching from a backgrounded mode to foreground execution or when handling asynchronous callbacks, the system must rigorously validate that the current context retains appropriate access controls. The identified issue indicates that this validation process was insufficient, allowing for a scenario where the security boundary between restricted and unrestricted operations became blurred due to race conditions or incomplete state resets.
This technical flaw enables an application to bypass intended authorization checks by exploiting inconsistencies in how permissions are tracked across different phases of its lifecycle. Specifically, if an app can manipulate or observe intermediate states before they are fully committed or revoked, it may gain unauthorized access to sensitive user data that should remain protected under standard privacy policies. This type of vulnerability is commonly classified under CWE-269 Improper Privilege Management and often relates to CWE-367 Time-of-check Time-of-use (TOCTOU) race conditions where the state checked at one moment differs from the state used during execution moments later. The ability for an app to access sensitive user data suggests that personal information, such as contacts, photos, location history, or health records, could be exfiltrated without explicit user consent or knowledge.
The operational impact of this vulnerability is significant because it undermines the fundamental trust model upon which modern mobile operating systems are built. Users rely on these platforms to isolate applications from one another and restrict access to private resources based on granular permissions granted at install time or during runtime prompts. If an app can circumvent these restrictions through state manipulation, it creates a pathway for data leakage that is difficult to detect using traditional perimeter-based security measures. Attackers could potentially develop malicious apps designed specifically to trigger this flaw, harvesting sensitive information in the background while appearing benign to users and automated review processes. This compromises both individual privacy rights and the integrity of the ecosystem by eroding confidence in platform-level safeguards.
Mitigation strategies primarily involve the software updates provided for iOS 26.7, iPadOS 26.7, iOS 27, iPadOS 27, tvOS 27, and visionOS 27. These patches address the root cause by enforcing stricter state management protocols within the kernel or system services responsible for handling application permissions. Developers should ensure that their applications adhere to strict lifecycle management practices, avoiding reliance on transient states for security decisions. Furthermore, implementing defense-in-depth measures such as runtime permission checks before every data access operation can provide an additional layer of protection against similar flaws in other components. Security researchers and auditors are advised to review application code for potential TOCTOU vulnerabilities and ensure that all state transitions explicitly re-validate authorization contexts rather than assuming continuity from previous states.