CVE-2021-35123

Memory corruption via unchecked GATT notification length

Published Jun 14, 2022 · Updated Aug 4, 2024

Buffer overflow in Qualcomm Snapdragon Connectivity and Snapdragon Industrial IOT lets physically proximate attackers corrupt memory over Bluetooth. The Bluetooth host copies data from a GATT multiple-notification packet without first validating that its length fits the destination buffer. An unauthenticated transmitter within Bluetooth range can trigger the corruption without user interaction; Qualcomm has not disclosed the resulting failure mode.

CVSS severity8.8
High
EPSS probability0.28%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Buffer overflow in Qualcomm Snapdragon Connectivity and Snapdragon Industrial IOT lets physically proximate attackers corrupt memory over Bluetooth. The Bluetooth host copies data from a GATT multiple-notification packet without first validating that its length fits the destination buffer. An unauthenticated transmitter within Bluetooth range can trigger the corruption without user interaction; Qualcomm has not disclosed the resulting failure mode.

The record

CVE
CVE-2021-35123
Published
Jun 14, 2022
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
Unavailable
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 14, 2022CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

8.8Qualcomm, Inc.CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
8.3NIST NVDAV:A/AC:L/Au:N/C:C/I:C/A:C

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)
Vectoradjacent
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

No sourced classifications are available.

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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