CVE-2025-68969 Overview
CVE-2025-68969 is a multi-thread race condition vulnerability affecting the thermal management module in Huawei HarmonyOS. This vulnerability arises from improper synchronization between concurrent threads accessing shared resources within the thermal management component. Successful exploitation of this vulnerability may affect the availability of affected devices, potentially causing system instability or denial of service conditions.
Critical Impact
Local attackers with low privileges may exploit this race condition to cause denial of service, impacting device availability and system stability.
Affected Products
- Huawei HarmonyOS 5.0.1
- Huawei HarmonyOS 5.1.0
- Huawei HarmonyOS 6.0.0
Discovery Timeline
- January 14, 2026 - CVE-2025-68969 published to NVD
- January 15, 2026 - Last updated in NVD database
Technical Details for CVE-2025-68969
Vulnerability Analysis
This vulnerability is classified as CWE-362 (Concurrent Execution using Shared Resource with Improper Synchronization), commonly known as a race condition. The thermal management module in HarmonyOS manages hardware temperature monitoring and thermal throttling across multiple processor threads. When multiple threads simultaneously access or modify shared thermal state data without proper locking mechanisms, a race condition can occur.
The attack requires local access to the system and low-level privileges, though the complexity of exploitation is high due to the precise timing required to trigger the race condition. The impact is limited to availability—there is no direct compromise of data confidentiality or integrity. However, successful exploitation could cause the thermal management subsystem to enter an inconsistent state, potentially leading to unexpected system behavior, thermal management failures, or device crashes.
Root Cause
The root cause of CVE-2025-68969 stems from inadequate synchronization primitives in the thermal management module's multi-threaded architecture. When concurrent threads access shared thermal state variables—such as temperature readings, throttling thresholds, or cooling policy configurations—without proper mutex locks or atomic operations, a Time-of-Check Time-of-Use (TOCTOU) condition can emerge. This allows one thread to read stale or partially updated data while another thread is in the process of modifying it, resulting in undefined behavior.
Attack Vector
The attack vector is local, meaning an attacker must have existing access to the target device. The attacker would need to create conditions where multiple threads interact with the thermal management module in a way that triggers the race condition. This could involve crafting specific sequences of system calls or manipulating processes that interact with thermal subsystems.
Due to the high attack complexity (requiring precise timing to hit the vulnerable window), exploitation in practice is challenging. The attacker would need to repeatedly attempt to trigger the race condition or have detailed knowledge of the system's threading model and timing characteristics.
The vulnerability mechanism involves concurrent thread execution paths accessing shared thermal state without proper synchronization. When thread timing aligns in a specific manner, one thread may read or write thermal data while another thread is performing operations on the same data, leading to resource contention and potential system instability. For detailed technical information, refer to the Huawei Consumer Security Bulletin.
Detection Methods for CVE-2025-68969
Indicators of Compromise
- Unexpected system crashes or reboots, particularly during high thermal load conditions
- Thermal management subsystem errors or warnings in system logs
- Abnormal CPU/GPU throttling behavior not correlated with actual temperature readings
- System instability when multiple applications simultaneously interact with hardware sensors
Detection Strategies
- Monitor system logs for thermal management module exceptions or race condition-related kernel warnings
- Implement application-level monitoring for unusual patterns of thermal API access
- Deploy endpoint detection solutions capable of identifying anomalous multi-threaded behavior in system modules
- Utilize SentinelOne Singularity Platform to detect behavioral anomalies associated with race condition exploitation attempts
Monitoring Recommendations
- Enable verbose logging for the thermal management subsystem to capture thread synchronization events
- Configure system monitoring to alert on repeated thermal subsystem crashes or restarts
- Track application behavior that involves high-frequency access to thermal management interfaces
- Implement SentinelOne Vigilance for 24/7 monitoring of device health and anomalous system behavior
How to Mitigate CVE-2025-68969
Immediate Actions Required
- Review the Huawei Consumer Security Bulletin for official patch availability
- Check for and apply the latest HarmonyOS security updates through device settings
- For laptop devices, review the Huawei Laptops Security Bulletin for specific guidance
- Limit local access to affected devices to trusted users only until patches are applied
Patch Information
Huawei has addressed this vulnerability in their January 2026 security bulletin. Users should update their HarmonyOS devices to the latest available version that contains the security fix. The patch likely introduces proper synchronization mechanisms (such as mutex locks or atomic operations) to the thermal management module to prevent the race condition from being triggered.
For official patch details and update instructions, refer to:
Workarounds
- Restrict local user access to the device to minimize the attack surface for local exploitation
- Monitor device behavior for signs of thermal subsystem instability and report anomalies
- Avoid running untrusted applications that may attempt to exploit system-level vulnerabilities
- Consider enterprise device management solutions to enforce security policies and rapid patch deployment
# Check current HarmonyOS version for patch status
# Navigate to: Settings > About phone > Software information
# Verify security patch level is January 2026 or later
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
