CVE-2026-58834 in Android
Summary
by MITRE • 10/05/2026
In setPermissionGrantState of DevicePolicyManagerService.java, there is a possible persistent denial of service due to improper input validation. This could lead to local denial of service with no additional execution privileges needed. User interaction is not needed for exploitation.
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Analysis
by VulDB Data Team • 10/05/2026
The vulnerability identified in the setPermissionGrantState method within DevicePolicyManagerService.java represents a critical flaw rooted in insufficient input validation, which can be leveraged by an attacker to induce a persistent denial of service condition on the affected Android device. This specific component is responsible for managing permission grants and revocations under the control of device policy controllers, acting as a central authority for enforcing security policies across applications installed on the system. When this method processes input parameters related to permission states without rigorous validation checks, it allows malformed or unexpected data structures to propagate through the service logic. The lack of proper boundary checking or type verification enables an attacker to trigger internal errors that crash the device policy manager process or corrupt its state machine, leading to a failure in handling subsequent requests and effectively halting critical system functions related to application permissions.
From a technical perspective, this flaw aligns with CWE-20 Improper Input Validation, as the service fails to adequately sanitize or verify the integrity of data received from potential callers before processing it within sensitive operational contexts. The persistence aspect of the denial of service is particularly concerning because it implies that once exploited, the device may require a reboot or manual intervention by an administrator with elevated privileges to restore normal functionality, rather than simply recovering after the malicious process terminates. This characteristic significantly increases the impact severity, as temporary disruptions can escalate into prolonged outages affecting all users and applications relying on the device policy infrastructure for security enforcement. The vulnerability does not require local execution privileges beyond what is typically granted to system services or privileged apps, nor does it necessitate user interaction, making it a low-barrier attack vector that could be triggered remotely if exposed via appropriate interfaces or through compromised managed profiles.
The operational impact of this vulnerability extends beyond simple service unavailability; it undermines the reliability and trustworthiness of device policy management mechanisms essential for enterprise mobility solutions and secure bootstrapping processes. In environments where automated configuration updates are pushed to devices, an attacker could exploit this flaw to disrupt these updates, leaving devices in a vulnerable or non-compliant state indefinitely. Furthermore, because DevicePolicyManagerService plays a pivotal role in coordinating security policies across multiple applications, its instability can cause cascading failures in dependent services that rely on accurate permission states for their own operation. This creates a broader systemic risk where the integrity of the entire device management framework is compromised due to a single point of failure within this specific method implementation.
Mitigation strategies must focus on implementing robust input validation mechanisms at the entry points of the setPermissionGrantState function. Developers should enforce strict type checking, range verification, and structural consistency checks for all parameters passed into the method before any state changes are attempted. Additionally, incorporating defensive programming techniques such as try-catch blocks with appropriate error handling can prevent unhandled exceptions from crashing the service process. It is also advisable to implement rate limiting or access controls to restrict which entities can invoke this critical function, thereby reducing the attack surface. For existing deployments, applying security patches that address these validation gaps provided by the device manufacturer is essential to restore resilience against such denial of service attacks and ensure continuous availability of device management capabilities in line with industry best practices for secure software development lifecycle adherence.