CVE-2023-21290

Local service interruption via raced permission reset

Published Aug 14, 2023 · Updated Oct 9, 2024

Race condition in MmsProvider.java in Google Android 11, 12, 12L, and 13 allows local users to interrupt device service. The permission-reset path validated an MMS-part pathname but passed the noncanonical path to chmod, allowing raced path resolution to redirect the permission change. A low-privileged local application can trigger the race without user interaction; the documented consequence is availability loss, not data disclosure or modification.

CVSS severity5.5
Medium
EPSS probability0.07%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Race condition in MmsProvider.java in Google Android 11, 12, 12L, and 13 allows local users to interrupt device service. The permission-reset path validated an MMS-part pathname but passed the noncanonical path to chmod, allowing raced path resolution to redirect the permission change. A low-privileged local application can trigger the race without user interaction; the documented consequence is availability loss, not data disclosure or modification.

The record

CVE
CVE-2023-21290
Published
Aug 14, 2023
Updated
Oct 9, 2024
Vendor
Google
Product
Android
Classifications
CWE-362, T1499
Attack vector
local
Privileges
Unavailable

Timeline

How it unfolded

  1. Aug 14, 2023CVE publishedPublication date reported by the CVE source.
  2. Oct 9, 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=11
  2. Affected versionversion=12
  3. Affected versionversion=12L
  4. Affected versionversion=13

What conditions does exploitation require?

Attack vectorlocal
Required privilegesUnavailable in this record.

What is affected?

Google · Androidversion=11; version=12; version=12L; version=13

Published CVSS scores

5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/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
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-362Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
T1499Endpoint Denial of Service

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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