CVE-2021-1007

Local information disclosure via incorrect HCI bounds check

Published Dec 15, 2021 · Updated Aug 3, 2024

Out-of-bounds read in Android 12 allows local users to disclose information via Bluetooth HCI event processing. The btu_hcif_process_event function in btu_hcif.cc applies an incorrect bounds check while handling an HCI event, permitting a read past the valid buffer boundary. System execution privileges are required, no user interaction is needed, and the reported consequence is local confidentiality loss without integrity or availability impact.

CVSS severity4.4
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

Out-of-bounds read in Android 12 allows local users to disclose information via Bluetooth HCI event processing. The btu_hcif_process_event function in btu_hcif.cc applies an incorrect bounds check while handling an HCI event, permitting a read past the valid buffer boundary. System execution privileges are required, no user interaction is needed, and the reported consequence is local confidentiality loss without integrity or availability impact.

The record

CVE
CVE-2021-1007
Published
Dec 15, 2021
Updated
Aug 3, 2024
Vendor
Google Cloud
Product
Android
Classifications
CWE-125, T1005
Attack vector
local
Privileges
admin

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-12

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

Google Cloud · Androidversion=Android-12

Published CVSS scores

2.1NVDAV:L/AC:L/Au:N/C:P/I:N/A:N
4.4NVDCVSS: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
T1005Data 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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