CVE-2025-54646
📋 TL;DR
This CVE describes an inadequate packet length check vulnerability in BLE (Bluetooth Low Energy) modules. Attackers could send specially crafted packets to cause performance degradation or denial of service. This affects devices with vulnerable BLE implementations, particularly IoT devices and mobile devices using affected BLE chipsets.
💻 Affected Systems
- Huawei devices with vulnerable BLE modules
📦 What is this software?
Emui by Huawei
Emui by Huawei
Emui by Huawei
Harmonyos by Huawei
Harmonyos by Huawei
Harmonyos by Huawei
Harmonyos by Huawei
Harmonyos by Huawei
Harmonyos by Huawei
Harmonyos by Huawei
Harmonyos by Huawei
Harmonyos by Huawei
⚠️ Risk & Real-World Impact
Worst Case
Complete denial of service through BLE channel exhaustion, rendering wireless functionality unusable until device restart
Likely Case
Performance degradation including increased latency, packet loss, and reduced BLE throughput
If Mitigated
Minor performance impact with proper packet validation and rate limiting
🎯 Exploit Status
Requires attacker to be within BLE range; no authentication needed to send BLE packets
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check Huawei security bulletin for specific firmware versions
Vendor Advisory: https://consumer.huawei.com/en/support/bulletin/2025/8/
Restart Required: Yes
Instructions:
1. Check Huawei security bulletin for affected device models. 2. Update device firmware through official channels (OTA update or HiSuite). 3. Verify update completion and BLE functionality.
🔧 Temporary Workarounds
Disable BLE when not needed
allTurn off Bluetooth Low Energy functionality to prevent exploitation
Settings > Bluetooth > Turn Off (on mobile devices)
Implement BLE packet filtering
enterpriseUse network security controls to filter abnormal BLE packets
🧯 If You Can't Patch
- Segment network to isolate BLE devices from untrusted networks
- Implement physical security controls to limit proximity access to BLE devices
🔍 How to Verify
Check if Vulnerable:
Check device model and firmware version against Huawei security bulletinCheck Version:
Settings > About Phone > Build Number (on Android/HarmonyOS devices)Verify Fix Applied:
Verify firmware version matches patched version in advisory and test BLE functionality📡 Detection & Monitoring
Log Indicators:
- Unusual BLE packet size errors
- BLE stack crash logs
- Performance degradation alerts
Network Indicators:
- Abnormal BLE packet sizes
- Excessive BLE connection attempts
- BLE throughput anomalies
SIEM Query:
source="ble_logs" AND (packet_size>normal_threshold OR error_code="length_check")