CVE-2022-20465 in Android
Summary
by MITRE • 11/09/2022
In dismiss and related functions of KeyguardHostViewController.java and related files, there is a possible lockscreen 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.Product: AndroidVersions: Android-10 Android-11 Android-12 Android-12L Android-13Android ID: A-218500036
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Analysis
by VulDB Data Team • 04/16/2026
The vulnerability identified as CVE-2022-20465 represents a critical security flaw within Android's lockscreen protection mechanisms, specifically affecting the KeyguardHostViewController component. This issue resides in the dismissal and related functions of the keyguard system, which governs the interface and security controls that protect user devices when they are locked. The vulnerability manifests as a logic error that fundamentally undermines the intended security posture of the Android lockscreen, creating a pathway for unauthorized access to device functions that should remain restricted while the device is secured.
The technical implementation flaw occurs within the keyguard host view controller's handling of dismissal events and related security functions. When users interact with the lockscreen, the system should maintain strict access controls to prevent unauthorized operations. However, the logic error in these components allows for bypassing the normal security checks that should occur during dismissal sequences. This vulnerability specifically affects multiple Android versions including Android 10 through Android 13, indicating a widespread impact across the Android ecosystem and suggesting that the underlying architectural flaw has persisted across several major releases.
The operational impact of this vulnerability is particularly severe as it enables local privilege escalation without requiring any additional execution privileges or user interaction for exploitation. This means that an attacker with access to a locked device could potentially bypass the lockscreen protection entirely and gain elevated privileges on the system. The lack of requirement for user interaction makes this vulnerability particularly dangerous as it can be exploited automatically without the device owner's knowledge or consent. The vulnerability essentially allows for a complete bypass of the lockscreen security model, which is fundamental to Android's device protection architecture.
From a cybersecurity perspective, this vulnerability aligns with CWE-284, which describes improper access control issues, and represents a clear violation of the principle of least privilege that should govern all security systems. The ATT&CK framework categorizes this type of vulnerability under privilege escalation techniques, specifically targeting the 'Exploitation for Privilege Escalation' tactic. The vulnerability's impact extends beyond simple bypass scenarios as it fundamentally compromises the device's security model, potentially allowing attackers to access sensitive data, modify system configurations, or execute malicious code with elevated privileges. Organizations and users should consider this vulnerability as a critical threat requiring immediate attention and remediation, particularly in environments where device security is paramount.
The mitigation strategy for this vulnerability requires prompt installation of security patches provided by Google and device manufacturers, as the flaw exists within the core operating system components. Device administrators should prioritize updating all affected Android devices to the latest security releases, particularly focusing on the keyguard and lockscreen system components. Additionally, organizations should implement monitoring for any suspicious activity on devices that may indicate exploitation attempts, and consider implementing additional security measures such as device encryption and remote management capabilities to minimize potential impact if exploitation occurs.