CVE-2022-20356

Local privilege escalation via spoofed package name

Published Aug 9, 2022 · Updated Sep 8, 2025

Improper input validation in Android 11, 12, and 12L Framework allows local users to escalate privileges by starting a foreground service. ActiveServices.java's shouldAllowFgsWhileInUsePermissionLocked accepts a caller-supplied package name without verifying that it belongs to the calling UID, allowing a background app to impersonate an allowlisted package and bypass foreground-service restrictions. An app already executing locally needs no additional privileges or user interaction; the bypass grants foreground-service access that Android's background restrictions should deny.

CVSS severity4.0
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

Improper input validation in Android 11, 12, and 12L Framework allows local users to escalate privileges by starting a foreground service. ActiveServices.java's shouldAllowFgsWhileInUsePermissionLocked accepts a caller-supplied package name without verifying that it belongs to the calling UID, allowing a background app to impersonate an allowlisted package and bypass foreground-service restrictions. An app already executing locally needs no additional privileges or user interaction; the bypass grants foreground-service access that Android's background restrictions should deny.

The record

CVE
CVE-2022-20356
Published
Aug 9, 2022
Updated
Sep 8, 2025
Vendor
Google Cloud
Product
Android
Classifications
CWE-269, T1404
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 9, 2022CVE publishedPublication date reported by the CVE source.
  2. Sep 8, 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-11 Android-12 Android-12L

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

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

Published CVSS scores

4.0CISA ADP VulnrichmentCVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N

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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-269Improper Privilege Management
T1404Exploitation 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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