CVE-2022-20494: PDoS by large zen rule names in platform/frameworks/base

platform/frameworks/base Updated 02 Oct 2025

Summary

01/01/2023

Disclosed on

CVE-2022-20494

CVE

Yes i

Fix available

High

Severity

Not published

CVSS Score

CVE-2022-20494: In AutomaticZenRule of AutomaticZenRule.java, there is a possible persistent DoS due to resource exhaustion. Affects platform/frameworks/base across 5 version ranges.

>= 10:0, < 10:2023-01-01 >= 11:0, < 11:2023-01-01 >= 12:0, < 12:2023-01-01 >= 12L:0, < 12L:2023-01-01 >= 13:0, < 13:2023-01-01

Fixed in 10:2023-01-01. How to fix ↓

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Background

The platform/frameworks/base package is a fundamental component of the Android ecosystem. It provides core functionalities and services for the Android operating system. One of its features is the AutomaticZenRule class, which allows users to define rules for automatic notification management. These rules can control how notifications are handled based on various conditions. However, a vulnerability has been discovered in the AutomaticZenRule class that can lead to a persistent denial of service (PDoS) attack.

Vulnerability Detail

The vulnerability exists in the AutomaticZenRule class of the platform/frameworks/base package. It is caused by a lack of proper resource management, which can result in resource exhaustion and lead to a local denial of service. An attacker can exploit this vulnerability without requiring any additional execution privileges or user interaction. By creating large zen rule names, an attacker can exhaust system resources and cause the device to become unresponsive. This vulnerability affects Android versions 10, 11, 12, 12L, and 13.

How To Fix

Minimum fixed version

10:2023-01-01

This is the first release that contains the fix.

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Workaround

There is no specific workaround mentioned for this vulnerability.

Conclusion

The vulnerability in the AutomaticZenRule class of the platform/frameworks/base package can lead to a persistent denial of service (PDoS) attack. It is important to update the package to the fixed version to mitigate the risk. For further support on vulnerability remediation, please contact DevNack.com.

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