CVE-2023-21267

Local information disclosure via exact flag comparison

Published Aug 14, 2023 · Updated Aug 2, 2024

Information disclosure in Android 12, 12L, 13, and 14 allows local users to bypass lockdown mode while screen pinning is active. LockPatternUtils.isUserInLockdown compares the complete strong-auth flag value for equality instead of testing the lockdown bit, so combined requirements are misclassified as not locked down. Exploitation requires local access to a screen-pinned device but no additional execution privileges or user interaction, and it exposes information otherwise protected by lockdown.

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

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Information disclosure in Android 12, 12L, 13, and 14 allows local users to bypass lockdown mode while screen pinning is active. LockPatternUtils.isUserInLockdown compares the complete strong-auth flag value for equality instead of testing the lockdown bit, so combined requirements are misclassified as not locked down. Exploitation requires local access to a screen-pinned device but no additional execution privileges or user interaction, and it exposes information otherwise protected by lockdown.

The record

CVE
CVE-2023-21267
Published
Aug 14, 2023
Updated
Aug 2, 2024
Vendor
Google
Product
Android
Classifications
CWE-200
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 14, 2023CVE publishedPublication date reported by the CVE source.
  2. Aug 2, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=12
  2. Affected versionversion=12L
  3. Affected versionversion=13
  4. Affected versionversion=14

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Google · Androidversion=12; version=12L; version=13; version=14

Published CVSS scores

5.5NIST NVDCVSS: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-200Exposure of Sensitive Information to an Unauthorized Actor

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

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo