Bluetooth Firmware -broadcom- Update Version 2.2.3.593 «Updated ⟶»

Technical Brief: Broadcom Bluetooth Firmware Update v2.2.3.593 April 11, 2026 Firmware Revision Analysis and Deployment Guidelines Target Hardware: Broadcom BCM20xx / BCM43xx Bluetooth Controller Series 1. Executive Summary Firmware version

The Broadcom Bluetooth firmware update version 2.2.3.593 is a specific driver and firmware package primarily associated with Sony VAIO and other legacy Windows laptops using Broadcom wireless chipsets bluetooth firmware -broadcom- update version 2.2.3.593

Key Negotiation of Bluetooth (KNOB) attack forced entropy reduction of encryption keys to 1 byte. Broadcom firmware pre-2.2.3.593 accepted malicious LMP_encryption_key_size_req with values < 7 octets. The new firmware enforces a minimum key size of 7 (56 bits) for BR/EDR connections, rejecting negotiation attempts below that threshold. Technical Brief: Broadcom Bluetooth Firmware Update v2