CVE-2022-20555

Local information disclosure via unterminated alias values

Published Dec 16, 2022 · Updated Apr 18, 2025

Out-of-bounds read in Android 13 libufdt allows local users with System privileges to disclose memory through a crafted device-tree alias. ufdt_get_node_by_path_len reads an alias property's bytes as a path without first confirming that the value is nonempty and NUL-terminated within its declared length. Exploitation requires System-level execution but no user interaction, and the bounded impact is disclosure of memory reachable during device-tree alias resolution.

CVSS severity4.4
Medium
EPSS probability0.17%
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 privileges to disclose memory through a crafted device-tree alias. ufdt_get_node_by_path_len reads an alias property's bytes as a path without first confirming that the value is nonempty and NUL-terminated within its declared length. Exploitation requires System-level execution but no user interaction, and the bounded impact is disclosure of memory reachable during device-tree alias resolution.

The record

CVE
CVE-2022-20555
Published
Dec 16, 2022
Updated
Apr 18, 2025
Vendor
Google Cloud
Product
Android
Classifications
CWE-125
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Dec 16, 2022CVE publishedPublication date reported by the CVE source.
  2. Apr 18, 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

4.4NIST NVDCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N
4.4CISA-ADPCVSS: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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 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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