CVE-2025-65296 in Camera Hub G3
Summary
by MITRE • 12/11/2025
NULL-pointer dereference vulnerabilities in Aqara Hub M2 4.3.6_0027, Hub M3 4.3.6_0025, and Camera Hub G3 4.1.9_0027 in the JSON processing enable denial-of-service attacks through malformed JSON inputs.
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Analysis
by VulDB Data Team • 12/11/2025
The CVE-2025-65296 vulnerability represents a critical null-pointer dereference flaw affecting multiple Aqara smart home devices including the Hub M2, Hub M3, and Camera Hub G3. These devices operate within the Internet of Things ecosystem and process JSON formatted data for communication with mobile applications and cloud services. The vulnerability stems from inadequate input validation during JSON parsing operations where the software fails to properly handle malformed or unexpected JSON structures. When processing such inputs, the system attempts to dereference a null pointer, leading to immediate application termination and system instability. This type of vulnerability falls under CWE-476 which specifically addresses null pointer dereference conditions in software implementations. The flaw exists in the firmware versions 4.3.6_0027 for Hub M2 and M3 models, and 4.1.9_0027 for the Camera Hub G3, indicating these are not isolated issues but rather systematic problems within the software architecture of these devices.
The operational impact of this vulnerability extends beyond simple device disruption to encompass broader security implications for home automation networks. Attackers can exploit this weakness by sending specially crafted JSON payloads to the affected devices, causing immediate denial-of-service conditions that render the devices inoperable until manual reboot or firmware update occurs. The attack surface is particularly concerning given that these devices typically operate continuously within home networks and may serve as entry points for more sophisticated attacks. The vulnerability aligns with ATT&CK technique T1499.004 which describes denial-of-service attacks targeting network infrastructure and connected devices. From a network security perspective, this weakness creates opportunities for attackers to disrupt smart home ecosystems, potentially affecting other connected devices that depend on the compromised hubs for communication and control functions. The devices may also be susceptible to persistent denial-of-service conditions if attackers repeatedly exploit the vulnerability, leading to extended periods of service unavailability.
Mitigation strategies for CVE-2025-65296 should focus on immediate firmware updates from Aqara to address the null-pointer dereference issue in JSON processing. Network administrators and device owners should implement network segmentation to isolate affected devices from critical network segments and monitor for unusual traffic patterns that might indicate exploitation attempts. The vulnerability demonstrates the importance of robust input validation and defensive programming practices, particularly in IoT devices where resource constraints may limit the implementation of comprehensive security measures. Security teams should consider implementing intrusion detection systems that can identify malformed JSON traffic patterns and alert on potential exploitation attempts. Additionally, the vulnerability highlights the need for proper error handling and exception management in embedded systems, as the lack of proper error recovery mechanisms leads to complete system failure. Organizations should also review their device management policies to ensure timely patch deployment and establish procedures for monitoring device health and responding to service disruptions. The incident underscores the necessity of incorporating security testing practices during the development lifecycle, particularly for IoT devices that handle untrusted input from various network sources.