CVE-2023-21372

Local privilege escalation via unchecked libdexfile read

Published Oct 30, 2023 · Updated Sep 17, 2024

Out-of-bounds read in libdexfile in Google Android 14 allows local users to escalate privileges via a missing bounds check without user interaction. The library reads input without validating the relevant boundary, allowing access beyond the valid buffer. A local foothold with low privileges is required, and successful exploitation grants higher privileges without additional execution privileges.

CVSS severity7.8
High
EPSS probability0.09%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds read in libdexfile in Google Android 14 allows local users to escalate privileges via a missing bounds check without user interaction. The library reads input without validating the relevant boundary, allowing access beyond the valid buffer. A local foothold with low privileges is required, and successful exploitation grants higher privileges without additional execution privileges.

The record

CVE
CVE-2023-21372
Published
Oct 30, 2023
Updated
Sep 17, 2024
Vendor
Google
Product
Android
Classifications
CWE-125, T1068
Attack vector
local
Privileges
Unavailable

Timeline

How it unfolded

  1. Oct 30, 2023CVE publishedPublication date reported by the CVE source.
  2. Sep 17, 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=14

What conditions does exploitation require?

Attack vectorlocal
Required privilegesUnavailable in this record.

What is affected?

Google · Androidversion=14

Published CVSS scores

7.8NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/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.

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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
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-125Out-of-bounds Read
T1068Exploitation for Privilege Escalation

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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