CVE-2026-58961 in Android
Summary
by MITRE • 11/02/2026
In moveTaskToFrontLocked of ActivityTaskManagerService.java, there is a possible background activity launch due to a logic error in the code. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation.
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Analysis
by VulDB Data Team • 11/02/2026
The vulnerability resides within the Android operating system's core window management subsystem, specifically affecting the ActivityTaskManagerService component responsible for managing application lifecycles and task stacks. The flaw is located in the moveTaskToFrontLocked method, a critical function that handles the logic required to bring an existing activity or task to the foreground of the user interface. This operation involves complex state transitions where the system must verify permissions, update display layers, and manage process priorities. A logical error within this specific code path allows for unintended background activity launches under conditions that should normally prevent such behavior. The root cause is a failure in proper access control checks or state validation during the task promotion sequence, which permits an entity to trigger UI changes without adhering to standard security constraints typically enforced by the Android framework.
From a technical perspective, this logic error constitutes a flaw in how the system validates the legitimacy of requests to manipulate activity states. In a secure implementation, any attempt to move a task or launch an activity from the background should require explicit user interaction or strict permission verification to prevent malicious applications from hijacking the interface. However, due to the identified defect, an attacker can exploit this gap by crafting specific intents or triggering system events that invoke the vulnerable code path without requiring direct user input such as taps or clicks. This absence of required user interaction significantly lowers the barrier for exploitation, allowing automated scripts or background processes to trigger the vulnerability silently. The result is a local escalation of privilege where an application with lower privileges can effectively manipulate higher-level UI components and potentially access data associated with foreground activities that it should not be able to reach.
The operational impact of this vulnerability extends beyond simple interface manipulation. By enabling unauthorized background activity launches, attackers can perform clickjacking attacks, overlay malicious interfaces over legitimate applications, or redirect user interactions to phishing pages without the victim's knowledge. This capability undermines the fundamental trust model of the Android sandboxing architecture, as it allows lower-privileged apps to interfere with higher-privileged system processes and user-facing components. Furthermore, this behavior can be leveraged in conjunction with other vulnerabilities to achieve arbitrary code execution or persistent access on the device. The ability to launch activities silently also facilitates data exfiltration scenarios where sensitive information displayed by foreground applications could be intercepted if the attacker gains control over the activity lifecycle events associated with those views.
This vulnerability aligns closely with CWE-20 Improper Input Validation, as the system fails to adequately validate the context and permissions of the request before executing state changes. It also maps to ATT&CK technique T1564 Hidden Window, which describes methods used by adversaries to hide malicious processes or windows from user view while they operate in the background. Additionally, it relates to CWE-287 Improper Authentication because the logic error bypasses expected authentication checks for UI manipulation actions. The lack of required user interaction further exacerbates the risk, placing this flaw in a high-severity category due to its ease of exploitation and potential for widespread abuse across various application types on affected devices.
Mitigation strategies primarily involve applying vendor-provided security patches that correct the logic within the ActivityTaskManagerService.java file. Developers must ensure that all calls to moveTaskToFrontLocked are preceded by rigorous checks verifying both the caller's identity and their permission level relative to the target activity. Implementing stricter input validation for task identifiers and ensuring that background-to-foreground transitions always require explicit user consent or high-level system privileges will resolve the issue. For end-users, maintaining up-to-date device firmware is critical as these patches are typically distributed through official OTA updates. Security researchers should monitor vendor advisories for specific fixes targeting this component in their respective Android versions to ensure protection against exploitation attempts that leverage silent activity launches and privilege escalation vectors.