CVE-2025-47328 Overview
CVE-2025-47328 is a transient denial of service vulnerability affecting Qualcomm firmware across a wide range of networking and wireless chipsets. The vulnerability occurs during the processing of power control requests when invalid antenna or stream values are provided, resulting in a buffer over-read condition (CWE-126). This flaw allows remote attackers to cause a temporary service disruption without requiring authentication or user interaction.
Critical Impact
Remote attackers can exploit this vulnerability to cause transient denial of service conditions on affected Qualcomm wireless and networking devices, potentially disrupting connectivity for enterprise and consumer systems.
Affected Products
- Qualcomm FastConnect 7800 Firmware
- Qualcomm IPQ Series (IPQ5300, IPQ5302, IPQ5312, IPQ5332, IPQ5424, IPQ9008, IPQ9048, IPQ9554, IPQ9570, IPQ9574)
- Qualcomm QCN Series (QCN5124, QCN5224, QCN6224, QCN6274, QCN6402, QCN6412, QCN6422, QCN6432, QCN9000, QCN9012, QCN9024, QCN9074, QCN9160, QCN9274)
- Qualcomm Snapdragon X72 and X75 5G Modem-RF Systems
- Qualcomm Immersive Home 3210 and 326 Platforms
- Qualcomm WCN Series (WCN7750, WCN7860, WCN7861, WCN7880, WCN7881)
- Qualcomm QCA Series (QCA0000, QCA8075-QCA8386)
- Qualcomm SM8735, SM8750, SM8750P Firmware
- Qualcomm WCD and WSA Audio Codec Firmware
Discovery Timeline
- September 24, 2025 - CVE-2025-47328 published to NVD
- September 25, 2025 - Last updated in NVD database
Technical Details for CVE-2025-47328
Vulnerability Analysis
The vulnerability exists in the power control request handling mechanism within affected Qualcomm firmware. When processing power control requests, the firmware fails to properly validate antenna or stream parameter values before using them to access memory buffers. This creates a buffer over-read condition where the firmware may read beyond the allocated memory boundaries.
The attack can be initiated remotely over a network connection without requiring any authentication credentials or user interaction. The vulnerability specifically impacts availability, causing a transient denial of service condition. No confidentiality or integrity impacts have been identified, meaning the vulnerability cannot be used to exfiltrate data or modify system configurations.
The transient nature of this DoS means affected devices may recover automatically after the attack ceases, but repeated exploitation could cause persistent service disruptions affecting wireless connectivity and network operations.
Root Cause
The root cause is a buffer over-read vulnerability (CWE-126) stemming from insufficient validation of input parameters. When the firmware receives power control requests containing out-of-bounds antenna or stream index values, it fails to verify these values fall within expected ranges before using them as array indices or buffer offsets. This allows an attacker to trigger reads from memory locations outside the intended buffer boundaries.
Attack Vector
The attack vector is network-based, requiring no privileges and no user interaction. An attacker can craft malicious power control requests containing invalid antenna or stream values and send them to vulnerable devices over the network.
The exploitation flow involves:
- An attacker identifies a device running vulnerable Qualcomm firmware
- The attacker crafts a power control request with malformed antenna or stream parameters containing values outside valid ranges
- The malicious request is transmitted to the target device over the network
- The firmware processes the request without proper bounds checking
- A buffer over-read occurs, causing the device to enter a denial of service state
Due to the lack of public exploit code and the transient nature of the DoS condition, this vulnerability presents a moderate but manageable risk when properly mitigated.
Detection Methods for CVE-2025-47328
Indicators of Compromise
- Unexpected device reboots or wireless connectivity interruptions on systems using affected Qualcomm chipsets
- Network traffic containing anomalous power control requests with out-of-range parameter values
- Firmware crash logs indicating buffer over-read errors in power control processing routines
- Repeated transient service disruptions affecting Qualcomm-based networking equipment
Detection Strategies
- Monitor network traffic for malformed power control frames targeting Qualcomm wireless interfaces
- Implement firmware crash analysis to identify patterns consistent with buffer over-read exploitation
- Deploy network intrusion detection rules to flag power control requests with invalid antenna or stream values
- Review system logs on affected devices for unexpected restart events or error conditions
Monitoring Recommendations
- Enable verbose logging on enterprise wireless access points and routers using affected Qualcomm chipsets
- Implement network traffic analysis at network boundaries to detect potential exploitation attempts
- Configure alerting for unusual patterns of wireless connectivity disruptions
- Monitor device health metrics for affected Qualcomm-based systems to detect transient DoS conditions
How to Mitigate CVE-2025-47328
Immediate Actions Required
- Review the Qualcomm Security Bulletin September 2025 for complete vulnerability details
- Inventory all devices using affected Qualcomm chipsets and firmware versions in your environment
- Prioritize firmware updates for internet-facing and critical infrastructure devices
- Implement network segmentation to limit exposure of vulnerable devices until patches can be applied
Patch Information
Qualcomm has published security information regarding this vulnerability in their September 2025 Security Bulletin. Organizations should obtain updated firmware from their device vendors who incorporate affected Qualcomm chipsets. The following resources provide official guidance:
- Qualcomm Security Bulletin September 2025 - Official vendor advisory with patch information
Contact your device manufacturer (OEM) for specific firmware update packages, as Qualcomm chipset firmware is typically distributed through device vendors rather than directly from Qualcomm.
Workarounds
- Implement network access controls to restrict which systems can send power control requests to vulnerable devices
- Deploy network filtering at perimeter devices to block malformed wireless management traffic
- Consider isolating critical Qualcomm-based devices on separate network segments with strict access policies
- Monitor for unusual traffic patterns targeting wireless management interfaces until patches are deployed
# Example: Network segmentation configuration for isolating vulnerable IoT/wireless devices
# Apply appropriate firewall rules based on your network architecture
# Restrict management interface access to trusted networks only
iptables -A INPUT -p udp --dport 5246 -s 10.0.0.0/8 -j ACCEPT
iptables -A INPUT -p udp --dport 5246 -j DROP
# Log suspicious traffic patterns for analysis
iptables -A INPUT -p udp --dport 5246 -j LOG --log-prefix "CAPWAP_CONTROL: "
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
