CVE-2026-0189 in Android
Summary
by MITRE • 09/15/2026
In ac_init_policy of init.c, there is a possible permission bypass 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 • 09/15/2026
The vulnerability identified within the ac_init_policy function located in the init.c source file represents a critical security flaw rooted in flawed logical design rather than traditional memory corruption or input validation errors. This logic error allows an attacker to bypass intended permission checks, effectively undermining the access control mechanisms that are supposed to restrict user actions based on their assigned privileges. The core of the issue lies in how the policy initialization process evaluates conditions before granting specific rights or executing privileged operations. When this evaluation fails to correctly enforce separation between different privilege levels, it creates a pathway for unauthorized elevation of status from a standard user account to one with administrative or root-level capabilities.
From a technical perspective, such logic errors often stem from race conditions, incorrect state management, or flawed conditional branching during the initialization phase of security policies. In this specific instance, the absence of rigorous checks ensures that certain operations proceed without verifying whether the invoking entity possesses the requisite authority. This is particularly dangerous because it does not require complex exploitation techniques like buffer overflows or format string attacks. Instead, an attacker can trigger the vulnerable code path simply by interacting with the system in a way that exploits the missing validation step. The simplicity of this attack vector significantly lowers the barrier to entry for potential adversaries, making the vulnerability highly exploitable even by individuals with limited technical expertise.
The operational impact of this flaw is severe due to its classification as a local privilege escalation vulnerability. An attacker who gains access to the system, whether through physical access or via another lower-level compromise such as phishing or web application exploitation, can leverage this logic error to gain full control over the affected environment. Once elevated privileges are obtained, the attacker can modify system configurations, install persistent backdoors, exfiltrate sensitive data, and move laterally across connected systems with impunity. The fact that no additional execution privileges are needed means that even a basic user account is sufficient to launch this attack, drastically increasing the risk surface for any organization relying on these systems for critical operations.
User interaction is not required for exploitation, which further amplifies the severity of the issue. This characteristic implies that if an attacker can place malicious code or scripts in a location accessible by the vulnerable process, they may achieve privilege escalation without needing to trick a user into clicking a link or opening a file. Automated tools could potentially detect and exploit this weakness silently, leading to undetected compromises that persist until discovered through anomalous system behavior or forensic analysis. The lack of required interaction makes proactive defense more challenging, as traditional perimeter defenses like firewalls may not prevent the initial foothold needed to trigger this local escalation.
To mitigate this vulnerability, immediate patching is essential. Developers must review and correct the logic within ac_init_policy in init.c to ensure that all permission checks are performed accurately before any privileged actions are executed. This involves implementing strict validation of user roles and ensuring that policy initialization sequences do not skip critical security gates under any circumstances. Additionally, adopting a defense-in-depth strategy is recommended. Implementing mandatory access control systems such as SELinux or AppArmor can provide an additional layer of protection by restricting what processes can do regardless of their effective UID/GID. Regular code audits focusing on authentication and authorization logic are also vital to prevent similar flaws in the future.
From an industry standard perspective, this vulnerability aligns with CWE-269 Improper Privilege Management, specifically where a principal is granted privileges that exceed its intended scope due to flawed implementation of access control policies. It may also relate to CWE-841 Improvement of Permissions if the logic error results in incorrect permission bits being set during initialization. In terms of attack taxonomy, this falls under MITRE ATT&CK technique T1068 Exploitation for Privilege Escalation, where attackers leverage software vulnerabilities to gain higher-level access on a compromised host. Understanding these classifications helps security teams prioritize remediation efforts and align their defensive measures with established best practices for mitigating privilege escalation risks in enterprise environments.