CVE-2022-20487

Local privilege escalation via unbounded notification fields

Published Dec 13, 2022 · Updated Apr 22, 2025

Resource exhaustion in Android 10 through 13 NotificationChannel allows local users to elevate privileges via oversized text fields. NotificationChannel and NotificationChannelGroup accept parcel-derived text fields without enforcing the 1,000-character limit, allowing resource exhaustion to prevent permission settings from being persisted. A local app needs no added execution privileges or user interaction; successful exploitation leaves permission changes unapplied and grants higher privilege.

CVSS severity7.8
High
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 NotificationChannel allows local users to elevate privileges via oversized text fields. NotificationChannel and NotificationChannelGroup accept parcel-derived text fields without enforcing the 1,000-character limit, allowing resource exhaustion to prevent permission settings from being persisted. A local app needs no added execution privileges or user interaction; successful exploitation leaves permission changes unapplied and grants higher privilege.

The record

CVE
CVE-2022-20487
Published
Dec 13, 2022
Updated
Apr 22, 2025
Vendor
Google Cloud
Product
Android
Classifications
CWE-770, T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Dec 13, 2022CVE publishedPublication date reported by the CVE source.
  2. Apr 22, 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

7.8NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
7.8CISA-ADPCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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-770Allocation of Resources Without Limits or Throttling
T1068Exploitation for Privilege Escalation

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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