CVE-2024-48289 identifies a vulnerability in the Bluetooth Low Energy (BLE) stack of Cypress Bluetooth SDK version 3.66. The flaw arises from improper handling of the LL_PAUSE_ENC_REQ packet, a control packet used in BLE link layer encryption pause requests. An attacker can craft a malformed LL_PAUSE_ENC_REQ packet that triggers a Denial of Service (DoS) condition, likely by causing a buffer overflow or similar memory corruption issue (CWE-120). This leads to the BLE device or stack becoming unresponsive or crashing, disrupting BLE communications. The vulnerability requires no privileges or user interaction but does require proximity or network access to the BLE interface. The CVSS v3.1 score is 6.5 (medium), reflecting the lack of confidentiality or integrity impact but significant availability impact. No patches or fixes have been released at the time of publication, and no known exploits are reported in the wild. This vulnerability affects embedded devices and IoT products that integrate Cypress Bluetooth SDK v3.66, which is widely used in consumer electronics, industrial sensors, and medical devices. Attackers could leverage this flaw to disrupt critical BLE communications, impacting device functionality and user experience.

The primary impact of CVE-2024-48289 is a Denial of Service on BLE-enabled devices using Cypress Bluetooth SDK v3.66. This can disrupt device connectivity, causing temporary or persistent loss of BLE communication. For consumer devices, this may result in loss of functionality such as fitness trackers, smart home devices, or peripherals becoming unresponsive. In industrial or medical environments, disruption could affect sensor data transmission, device monitoring, or control systems, potentially leading to operational delays or safety concerns. Since the vulnerability does not affect confidentiality or integrity, data theft or manipulation is not a direct risk. However, availability degradation can have cascading effects in environments relying heavily on BLE for critical operations. The ease of exploitation (no authentication or user interaction) combined with the widespread use of Cypress BLE stacks increases the risk profile for affected organizations.

Organizations should immediately inventory devices and products using Cypress Bluetooth SDK v3.66 to identify exposure. Since no patches are currently available, mitigating controls include limiting physical and wireless access to BLE interfaces, such as disabling BLE when not in use or restricting BLE communication range. Network segmentation and monitoring for anomalous BLE traffic patterns, especially malformed LL_PAUSE_ENC_REQ packets, can help detect exploitation attempts. Vendors and developers should prioritize updating to patched SDK versions once released by Cypress. For critical environments, consider deploying BLE intrusion detection systems or employing fallback communication channels to maintain availability during attacks. Additionally, applying strict input validation and robust error handling in BLE stack implementations can reduce the risk of similar vulnerabilities.