Usb bluetooth device ACL read cb buffer overflow (zephyrproject-rtos zephyr)

CVE-2021-3966

CRITICAL 9.6

At a glance

Source: NVD
EPSS: EPSS 0.50 % · percentile 43 (2026-11-01)
State: PUBLISHED
Published: 2023-01-11 00:00 UTC
Updated: 2025-04-09 18:29 UTC
Assigner: zephyr
NVD status: Modified

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Description

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

Weaknesses (CWE)

CWE-122 — Heap-based Buffer Overflow
CWE-120 — Buffer Copy without Checking Size of Input

References

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

Scores

Version	Score	Vector	Scored by
CVSS 3.1	CRITICAL 9.6	CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:L/I:H/A:H	zephyr
CVSS 3.1	CRITICAL 9.6	CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:L/I:H/A:H	NVD · vulnerabilities@zephyrproject.org (Secondary)
CVSS 3.1	HIGH 8.8	CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H	NVD · nvd@nist.gov (Primary)

European references

ENISA EUVD · EUVD-2021-27171
GCVE · GCVE-0-2021-3966

Affected configurations (NVD CPE)

cpe:2.3:o:zephyrproject:zephyr:*:*:*:*:*:*:*:* < 3.0.0

Affected products

Product	Versions
zephyrproject-rtos · zephyr	affected unspecified ≤ v3.0

Sources

Source	Licence
CVE List (CVEProject cvelistV5)	CVE Program Terms of Use
EPSS (FIRST.org)	FIRST — attribution requested
ENISA EUVD	ENISA — reproduction authorised, source acknowledged
NVD (NIST) via fkie-cad/nvd-json-data-feeds	Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD