CVE-2021-31609

medium

Description

The Bluetooth Classic implementation in Silicon Labs iWRAP 6.3.0 and earlier does not properly handle the reception of an oversized LMP packet greater than 17 bytes, allowing attackers in radio range to trigger a crash in WT32i via a crafted LMP packet.

References

https://www.silabs.com/wireless/bluetooth/bluegiga-classic-legacy-modules/device.wt32i-a

https://dl.packetstormsecurity.net/papers/general/braktooth.pdf

Details

Source: Mitre, NVD

Published: 2021-09-07

Updated: 2026-06-17

Risk Information

CVSS v2

Base Score: 3.3

Vector: CVSS2#AV:A/AC:L/Au:N/C:N/I:N/A:P

Severity: Low

CVSS v3

Base Score: 6.5

Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Severity: Medium

EPSS

EPSS: 0.00129