CVE-2021-31609: Silabs Iwrap

Medium severity, CVSS 6.5. EPSS: 0.4% chance of exploitation in the next 30 days.

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.

Affected products

• Silabs Iwrap: up to and including 6.3.0

Published 2021-09-07. Last modified 2026-06-17.