CVE-2023-21095

Protected-content disclosure via system-gesture race

Published Jun 15, 2023 · Updated Dec 18, 2024

Lockscreen bypass in Android 12L and 13 allows local users to access protected content through a system-gesture race. The canStartSystemGesture method briefly accepts gestures while the emergency dialer opens because notificationPanelExpanded and occluded are both false, misrouting input behind the keyguard. Exploitation requires local access during that race; no user interaction is needed, and the published impact is limited to disclosure behind the lockscreen.

CVSS severity4.7
Medium
EPSS probability0.06%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Lockscreen bypass in Android 12L and 13 allows local users to access protected content through a system-gesture race. The canStartSystemGesture method briefly accepts gestures while the emergency dialer opens because notificationPanelExpanded and occluded are both false, misrouting input behind the keyguard. Exploitation requires local access during that race; no user interaction is needed, and the published impact is limited to disclosure behind the lockscreen.

The record

CVE
CVE-2023-21095
Published
Jun 15, 2023
Updated
Dec 18, 2024
Vendor
Google Cloud
Product
Android
Classifications
CWE-362, T1404, T1461
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 15, 2023CVE publishedPublication date reported by the CVE source.
  2. Dec 18, 2024Record 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-12L Android-13

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

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

Published CVSS scores

4.7NIST NVDCVSS:3.1/AV:L/AC:H/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-362Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
T1404Exploitation for Privilege Escalation
T1461Lockscreen Bypass

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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