CVE-2023-21025

Local information disclosure via incomplete fixup-array bounds check

Published Mar 24, 2023 · Updated Feb 25, 2025

Out-of-bounds read in Android 13 libufdt allows local users with System execution privileges to disclose process memory without interaction. The ufdt_local_fixup_prop function in ufdt_overlay.c fails to validate that a fixup-offset property is a complete array of fdt32_t values, so iteration reads past the property buffer. Exploitation requires existing System execution privileges and exposes adjacent memory, with no reported integrity or availability impact.

CVSS severity4.4
Medium
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 Android 13 libufdt allows local users with System execution privileges to disclose process memory without interaction. The ufdt_local_fixup_prop function in ufdt_overlay.c fails to validate that a fixup-offset property is a complete array of fdt32_t values, so iteration reads past the property buffer. Exploitation requires existing System execution privileges and exposes adjacent memory, with no reported integrity or availability impact.

The record

CVE
CVE-2023-21025
Published
Mar 24, 2023
Updated
Feb 25, 2025
Vendor
Google Cloud
Product
Android
Classifications
CWE-125
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Mar 24, 2023CVE publishedPublication date reported by the CVE source.
  2. Feb 25, 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?

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  1. Affected versionversion=Android-13

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

Google Cloud · Androidversion=Android-13

Published CVSS scores

4.4CISA ADPCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N
4.4NIST NVDCVSS:3.1/AV:L/AC:L/PR:H/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.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-125Out-of-bounds Read

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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