CVE-2022-20414

Boot loop via unhandled alarm-limit exception

Published Nov 8, 2022 · Updated May 1, 2025

Denial of service in Android 10, 11, 12, 12L, and 13 allows local users to force a device into a boot loop via alarm exhaustion. AlarmManagerService.setImpl throws an uncaught IllegalStateException when the system UID reaches MAX_ALARMS_PER_UID; notification snoozing can drive system-created alarms to that limit. A local app needs no additional execution privileges or user interaction, and repeated system-server restarts leave the device unavailable.

CVSS severity5.5
Medium
EPSS probability0.13%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in Android 10, 11, 12, 12L, and 13 allows local users to force a device into a boot loop via alarm exhaustion. AlarmManagerService.setImpl throws an uncaught IllegalStateException when the system UID reaches MAX_ALARMS_PER_UID; notification snoozing can drive system-created alarms to that limit. A local app needs no additional execution privileges or user interaction, and repeated system-server restarts leave the device unavailable.

The record

CVE
CVE-2022-20414
Published
Nov 8, 2022
Updated
May 1, 2025
Vendor
Google Cloud
Product
Android
Classifications
CWE-755, T1479
Attack vector
local
Privileges
Unavailable

Timeline

How it unfolded

  1. Nov 8, 2022CVE publishedPublication date reported by the CVE source.
  2. May 1, 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 privilegesUnavailable in this record.

What is affected?

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

Published CVSS scores

5.5NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
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
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-755Improper Handling of Exceptional Conditions
T1479Denial of Service

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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