CVE-2025-44559
📋 TL;DR
A vulnerability in Realtek RTL8762E BLE SDK v1.4.0 allows attackers within Bluetooth range to cause a Denial of Service (DoS) by sending specially crafted control packets. This affects devices using the vulnerable Bluetooth Low Energy stack, potentially disrupting Bluetooth functionality. The attack requires proximity to the target device.
💻 Affected Systems
- Devices using Realtek RTL8762E Bluetooth Low Energy chipset
⚠️ Manual Verification Required
This CVE does not have specific version information in our database, so automatic vulnerability detection cannot determine if your system is affected.
Why? The CVE database entry doesn't specify which versions are vulnerable (no version ranges provided by the vendor/NVD).
🔒 Custom verification scripts are available for registered users. Sign up free to download automated test scripts.
- Review the CVE details at NVD
- Check vendor security advisories for your specific version
- Test if the vulnerability is exploitable in your environment
- Consider updating to the latest version as a precaution
⚠️ Risk & Real-World Impact
Worst Case
Permanent Bluetooth functionality disruption requiring device restart or hardware reset, potentially affecting critical IoT or medical devices.
Likely Case
Temporary Bluetooth service disruption until device restarts, affecting consumer electronics and IoT devices.
If Mitigated
Minimal impact with proper network segmentation and Bluetooth range limitations.
🎯 Exploit Status
Proof of concept available on GitHub demonstrates the attack sequence.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: http://realtek.com
Restart Required: Yes
Instructions:
1. Check Realtek website for updated BLE SDK. 2. Update firmware on affected devices. 3. Restart devices after update.
🔧 Temporary Workarounds
Disable Bluetooth when not needed
linuxTurn off Bluetooth functionality to prevent exploitation
sudo systemctl stop bluetooth
sudo systemctl disable bluetooth
Reduce Bluetooth range
linuxLimit Bluetooth transmission power to reduce attack surface
sudo hciconfig hci0 down
sudo hciconfig hci0 up -p 0
🧯 If You Can't Patch
- Physically isolate Bluetooth devices from untrusted areas
- Implement Bluetooth device whitelisting and pairing restrictions
🔍 How to Verify
Check if Vulnerable:
Check device specifications for Realtek RTL8762E chipset and BLE SDK version 1.4.0Check Version:
Check device manufacturer documentation for firmware versionVerify Fix Applied:
Verify updated firmware version and test Bluetooth functionality under crafted packet conditions📡 Detection & Monitoring
Log Indicators:
- Bluetooth stack crashes
- Unusual BLE control packet sequences
- Bluetooth service restart logs
Network Indicators:
- Abnormal BLE packet patterns
- Repeated connection attempts with crafted packets
SIEM Query:
source="bluetooth" AND (event="crash" OR event="restart") AND packet_sequence="abnormal"