CVE-2025-21016

Vulnerability

CVE-2025-21016 describes an improper access control vulnerability in PkgPredictorService on Chinese Android versions 13, 14, 15, and 16. The issue exists in software prior to the SMR Aug-2025 Release 1 security update. The root cause is missing or insufficient permission checks, allowing unauthorized access to privileged APIs [1].

Exploitation

Exploitation requires local access to the device. The attacker does not need additional authentication beyond being able to execute code or commands on the target system. By leveraging the improper access control, a local attacker can call privileged APIs that should be restricted to more trusted contexts [1].

Impact

Successful exploitation enables a local attacker to use privileged APIs, which could lead to unauthorized actions such as modifying system settings, accessing sensitive data, or performing other operations that require elevated privileges. The exact impact depends on the specific APIs exposed by PkgPredictorService.

Mitigation

Samsung has addressed this vulnerability in the SMR Aug-2025 Release 1 security update for Chinese Android devices. Users are advised to install the update as soon as possible to protect against potential attacks [1].