CVE-2022-20455

Persistent denial of service via spoofed system rules

Published Feb 28, 2023 · Updated Mar 21, 2025

Resource exhaustion in Android 10 through 13 allows local users to cause persistent denial of service through automatic Zen rules. ZenModeHelper.addAutomaticZenRule trusted the rule owner's spoofable package name when deciding that a rule was a system rule, bypassing component validation. An installed app with notification-policy access can repeatedly register crafted rules without user interaction, exhausting persistent system resources.

CVSS severity5.5
Medium
EPSS probability0.12%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Resource exhaustion in Android 10 through 13 allows local users to cause persistent denial of service through automatic Zen rules. ZenModeHelper.addAutomaticZenRule trusted the rule owner's spoofable package name when deciding that a rule was a system rule, bypassing component validation. An installed app with notification-policy access can repeatedly register crafted rules without user interaction, exhausting persistent system resources.

The record

CVE
CVE-2022-20455
Published
Feb 28, 2023
Updated
Mar 21, 2025
Vendor
Google Cloud
Product
Android
Classifications
CWE-400, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 28, 2023CVE publishedPublication date reported by the CVE source.
  2. Mar 21, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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  1. Affected versionversion=Android-10 Android-11 Android-12 Android-12L Android-13

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Google Cloud · Androidversion=Android-10 Android-11 Android-12 Android-12L Android-13

Published CVSS scores

5.5CISA-ADPCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-400Uncontrolled Resource Consumption
T1499.004Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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