CVE-2022-20465: Unlocking SIM PUK results in unlocking phone directly in Android platform/frameworks/base

platform/frameworks/base Updated 02 Oct 2025

Summary

01/11/2022

Disclosed on

CVE-2022-20465

CVE

Yes i

Fix available

High

Severity

Not published

CVSS Score

CVE-2022-20465: 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. Affects platform/frameworks/base versions < 10:2022-11-01. Fixed in 10:2022-11-01. How to fix ↓

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Background

The Android platform/frameworks/base package is a fundamental component of the Android operating system. It provides core functionalities and services for various system processes and user applications. This package includes the KeyguardHostViewController.java file, which is responsible for managing the lockscreen and related functions. The lockscreen is a crucial security feature that prevents unauthorized access to the device. However, a vulnerability in the code of KeyguardHostViewController.java allows for a logic error that can bypass the lockscreen, leading to a local privilege escalation. This vulnerability affects Android versions 10 and above.

Vulnerability Detail

The vulnerability arises from a logic error in the dismiss and related functions of KeyguardHostViewController.java. By exploiting this flaw, an attacker can bypass the lockscreen without requiring any additional execution privileges or user interaction. This can result in a local escalation of privilege, granting unauthorized access to the device. The impact of this vulnerability is significant as it undermines the security provided by the lockscreen and can potentially expose sensitive user data and compromise the device's integrity.

How To Fix

Minimum fixed version

10:2022-11-01

This is the first release that contains the fix.

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Workaround

There is no known workaround for this vulnerability. It is essential to apply the provided patch or update the affected Android devices to a fixed version as soon as possible.

Conclusion

The vulnerability in the Android platform/frameworks/base package allows for a lockscreen bypass, leading to a local privilege escalation. It is crucial to apply the provided patch or update the affected Android devices to a fixed version to mitigate the risk of unauthorized access and potential compromise of sensitive data. For further support on vulnerability remediation, please contact DevNack.com.

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