CVE-2025-68969 Overview
CVE-2025-68969 is a multi-thread race condition vulnerability in the thermal management module of Huawei HarmonyOS. The flaw is tracked as [CWE-362] (Concurrent Execution using Shared Resource with Improper Synchronization). Successful exploitation may affect device availability, resulting in a denial of service condition on the affected system. The vulnerability requires local access and low privileges, and Huawei has addressed the issue in its January 2026 security bulletins for both consumer devices and laptops.
Critical Impact
A local attacker with low privileges can trigger a race condition in the thermal management module to disrupt device availability on Huawei HarmonyOS 5.0.1, 5.1.0, and 6.0.0.
Affected Products
- Huawei HarmonyOS 5.0.1
- Huawei HarmonyOS 5.1.0
- Huawei HarmonyOS 6.0.0
Discovery Timeline
- 2026-01-14 - CVE-2025-68969 published to NVD
- 2026-01-15 - Last updated in NVD database
Technical Details for CVE-2025-68969
Vulnerability Analysis
The vulnerability resides in the HarmonyOS thermal management module, which monitors and regulates device temperature across CPU, GPU, and battery subsystems. Multiple threads access shared thermal state without adequate synchronization. An attacker running concurrent operations can race these threads to corrupt shared state.
The defect is classified under [CWE-362], covering improper synchronization of shared resources across concurrent execution contexts. Exploitation requires local access to the device and a low-privileged user context, with no user interaction required. The impact is limited to availability, with no confidentiality or integrity loss.
Root Cause
The root cause is missing or insufficient locking around shared data structures inside the thermal management subsystem. When two or more threads execute critical sections concurrently, the absence of mutual exclusion produces inconsistent state or invalid memory references. The window for successful exploitation is narrow, reflected in the high attack complexity rating.
Attack Vector
A local attacker with low privileges launches multiple threads that interact with the thermal management interfaces. By repeatedly triggering thermal events or queries in parallel, the attacker increases the probability of winning the race. A successful race corrupts thermal state and can crash the module or the device, producing a denial of service. The vulnerability cannot be exploited remotely and requires code execution on the target device.
No proof-of-concept code is publicly available. See the Huawei Security Bulletin 2026-1 for vendor technical details.
Detection Methods for CVE-2025-68969
Indicators of Compromise
- Unexpected device reboots or system hangs correlated with thermal subsystem activity in HarmonyOS device logs.
- Repeated crashes or kernel panics referencing thermal driver components.
- Anomalous processes spawning multiple threads that interact with thermal sysfs nodes or HarmonyOS thermal APIs.
Detection Strategies
- Collect HarmonyOS device logs and search for thermal module fault traces, watchdog timeouts, and abnormal process terminations.
- Profile applications that issue high-frequency thermal queries or rapid concurrent calls to thermal management interfaces.
- Correlate device reboot events with the running process inventory to identify suspicious local applications.
Monitoring Recommendations
- Enable mobile device management (MDM) telemetry on Huawei HarmonyOS endpoints to capture crash and reboot events.
- Track installed application inventory and flag sideloaded or unsigned applications running on affected HarmonyOS versions.
- Monitor for repeated availability incidents on the same device, which may indicate exploitation attempts.
How to Mitigate CVE-2025-68969
Immediate Actions Required
- Apply the January 2026 HarmonyOS security patches referenced in the Huawei Security Bulletin 2026-1 and Huawei Laptop Security Bulletin 2026-1.
- Inventory all Huawei HarmonyOS devices running versions 5.0.1, 5.1.0, or 6.0.0 and prioritize them for update deployment.
- Restrict installation of untrusted third-party applications on affected devices until patches are applied.
Patch Information
Huawei has released fixes in its January 2026 security bulletins. Refer to the Huawei Security Bulletin 2026-1 for consumer device updates and the Huawei Laptop Security Bulletin 2026-1 for laptop updates. Install the latest available HarmonyOS firmware through the device's system update mechanism.
Workarounds
- Limit local access to affected devices by enforcing screen locks, strong authentication, and device encryption.
- Restrict application installation to the official Huawei AppGallery and block sideloading via MDM policy where supported.
- Remove or disable applications that exhibit abnormal thermal API usage patterns pending patch deployment.
# Configuration example: enforce update policy via MDM for HarmonyOS fleet
# Replace placeholders with values from your MDM platform
mdm-cli policy set \
--platform harmonyos \
--min-version 6.0.0-january-2026 \
--enforce-update true \
--block-sideload true
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
