CVE-2022-20448

Cross-user notification disclosure via unchecked accessibility event

Published Nov 8, 2022 · Updated May 1, 2025

Permissions bypass in Android 10, 11, 12, 12L, and 13 allows local users to access another user's notification data. NotificationManagerService.buzzBeepBlinkLocked sends an accessibility event without checking that its notification belongs to the current user. A low-privileged local app can trigger the cross-user event without user interaction, exposing notification data but not modifying it.

CVSS severity5.5
Medium
EPSS probability0.11%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Permissions bypass in Android 10, 11, 12, 12L, and 13 allows local users to access another user's notification data. NotificationManagerService.buzzBeepBlinkLocked sends an accessibility event without checking that its notification belongs to the current user. A low-privileged local app can trigger the cross-user event without user interaction, exposing notification data but not modifying it.

The record

CVE
CVE-2022-20448
Published
Nov 8, 2022
Updated
May 1, 2025
Vendor
Google Cloud
Product
Android
Classifications
CWE-276, T1068
Attack vector
local
Privileges
authenticated

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?

Compare these published version ranges with your installed build and any vendor patches.

  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

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

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-276Incorrect Default Permissions
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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