CVE-2021-0966

Local information disclosure via uninitialized parcel fields

Published Dec 15, 2021 · Updated Aug 3, 2024

Information disclosure in Android 11 and Android 12 allows local users to read target-process memory through crafted Binder transactions. BuildParcelFields in generate_cpp.cpp emits parcelable-handling code that leaves data uninitialized, then carries those bytes across a Binder transaction into another process. A low-privileged local process can trigger the disclosure without user interaction; the reported impact is limited to reading memory, not modifying data or interrupting service.

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

What happened

Information disclosure in Android 11 and Android 12 allows local users to read target-process memory through crafted Binder transactions. BuildParcelFields in generate_cpp.cpp emits parcelable-handling code that leaves data uninitialized, then carries those bytes across a Binder transaction into another process. A low-privileged local process can trigger the disclosure without user interaction; the reported impact is limited to reading memory, not modifying data or interrupting service.

The record

CVE
CVE-2021-0966
Published
Dec 15, 2021
Updated
Aug 3, 2024
Vendor
Google Cloud
Product
Android
Classifications
CWE-909, T1533
Attack vector
local
Privileges
Unavailable

Timeline

How it unfolded

  1. Dec 15, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 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?

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  1. Affected versionversion=Android-11 Android-12

What conditions does exploitation require?

Attack vectorlocal
Required privilegesUnavailable in this record.

What is affected?

Google Cloud · Androidversion=Android-11 Android-12

Published CVSS scores

5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
2.1NIST NVDAV:L/AC:L/Au:N/C:P/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

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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-909Missing Initialization of Resource
T1533Data from Local System

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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