CVE-2021-3966

Usb bluetooth device ACL read cb buffer overflow

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Published Jan 11, 2023 CVSS 3.1 · 9.6 Critical EPSS < 1% KEV · Not listed

Description

usb device bluetooth class includes a buffer overflow related to implementation of net_buf_add_mem.

Affected Products

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

zephyrproject-rtos

zephyr

affected

Version	Status	Constraints
`unspecified`	affected	≤ v3.0

Configuration 1 [-]

cpe:2.3:o:zephyrproject:zephyr:*:*:*:*:*:*:*:*

No data.

No data available yet.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source	ID	Title
EUVD	EUVD-2021-27171	usb device bluetooth class includes a buffer overflow related to implementation of net_buf_add_mem.

Metrics

No CVSS v4.0

Attack Vector Adjacent Network

Attack Complexity Low

Privileges Required None

Scope Changed

Confidentiality Impact Low

Integrity Impact High

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Exploit prediction score: < 1% (0.500% probability within 30 days)

Exploitation poc

Automatable no

Technical Impact total

References

Link	Providers
https://github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-hfxq-3w6x-fv2m

History

Apr 9, 2025 7:15 PM Scoring metrics updated View changes

Type	Values Removed	Values Added
Metrics		ssvc `{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'total'}, 'version': '2.0.3'}`

Subscriptions

Zephyrproject Zephyr

Weaknesses

Sources

CVE record Updated: Apr 9, 2025, 6:29 PM

Status: PUBLISHED
Assigner: zephyr
Published: Jan 11, 2023, 12:00 AM
Updated: Apr 9, 2025, 6:29 PM
Reserved: Nov 16, 2021, 12:00 AM

View source JSON

Vulnrichment Updated: Aug 3, 2024, 5:09 PM

Updated: Aug 3, 2024, 5:09 PM

NVD Updated: Jun 17, 2026, 4:06 AM

Status: Modified
Published: Jan 11, 2023, 5:15 AM
Modified: Jun 17, 2026, 4:06 AM

View source JSON

Red Hat No data

No data.

OpenCVE enrichment No data

No data.

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