CVE-2025-68958: Huawei HarmonyOS Race Condition Flaw

CVE-2025-68958 Overview

CVE-2025-68958 is a multi-thread race condition vulnerability affecting the card framework module in Huawei HarmonyOS. This vulnerability arises from improper synchronization between concurrent threads, which can lead to unpredictable behavior when multiple threads attempt to access shared resources simultaneously. Successful exploitation of this vulnerability may affect system availability, potentially causing denial of service conditions on affected devices.

Critical Impact

Exploitation of this race condition vulnerability can result in denial of service, impacting device availability for users of affected HarmonyOS devices including smartphones, laptops, and wearables.

Affected Products

• Huawei HarmonyOS 6.0.0
• Huawei HarmonyOS laptops
• Huawei HarmonyOS wearables

Discovery Timeline

• 2026-01-14 - CVE-2025-68958 published to NVD
• 2026-01-15 - Last updated in NVD database

Technical Details for CVE-2025-68958

Vulnerability Analysis

This vulnerability is classified as CWE-362 (Concurrent Execution using Shared Resource with Improper Synchronization), commonly known as a race condition. The flaw exists within the card framework module of HarmonyOS, where multiple threads can concurrently access shared resources without proper synchronization mechanisms.

Race conditions occur when the outcome of a program depends on the relative timing of events, such as the order in which threads execute. In this case, the card framework module fails to properly serialize access to critical data structures, creating a window of opportunity where concurrent thread execution can lead to inconsistent state or resource corruption.

The local attack vector and high complexity requirements suggest that exploitation requires the attacker to have local access to the device and must carefully time their attack to trigger the race condition window. While no information disclosure or integrity impact is documented, the availability impact is significant, potentially causing system instability or crashes.

Root Cause

The root cause of CVE-2025-68958 lies in insufficient thread synchronization within the card framework module. The module appears to lack proper mutex locks, semaphores, or other synchronization primitives that would ensure atomic access to shared resources. This creates a Time-of-Check Time-of-Use (TOCTOU) window where the state of shared data can change between validation and use, leading to undefined behavior.

Attack Vector

The attack vector for this vulnerability is local, requiring an attacker to have access to the target device. Exploitation involves triggering multiple simultaneous operations that interact with the card framework module, creating conditions where the race window can be exploited.

The attacker would need to:

1. Gain local access to an affected HarmonyOS device
2. Identify the timing window where the race condition can be triggered
3. Execute concurrent operations targeting the vulnerable card framework module
4. Time the operations to exploit the synchronization gap

The high attack complexity indicates that successful exploitation requires precise timing and potentially multiple attempts to reliably trigger the race condition.

Detection Methods for CVE-2025-68958

Indicators of Compromise

• Unexpected application crashes or system instability related to card framework operations
• Abnormal CPU utilization patterns indicating concurrent thread contention
• System log entries showing synchronization errors or timeout failures in the card framework module

Detection Strategies

• Monitor system logs for crash reports or error messages originating from the card framework module
• Implement application-level monitoring to detect unusual thread activity patterns
• Deploy behavioral analysis to identify attempts to trigger rapid concurrent operations on the card framework

Monitoring Recommendations

• Enable verbose logging for the card framework module to capture timing-related errors
• Set up alerts for repeated system crashes or service restarts that may indicate exploitation attempts
• Monitor device performance metrics for anomalous patterns that could suggest race condition exploitation

How to Mitigate CVE-2025-68958

Immediate Actions Required

• Update affected HarmonyOS devices to the latest security patch level as specified in Huawei's January 2026 security bulletin
• Review and apply all available firmware updates for HarmonyOS laptops and wearables
• Limit local access to devices where possible until patches are applied

Patch Information

Huawei has released security patches addressing this vulnerability in their January 2026 security bulletins. Administrators and users should consult the following resources for patch details:

• Huawei Consumer Security Bulletin - Primary security bulletin for HarmonyOS devices
• Huawei Laptops Security Update - Specific guidance for HarmonyOS laptops
• Huawei Wearables Security Notice - Security updates for HarmonyOS wearable devices

Workarounds

• Restrict physical and local access to affected devices until patches can be applied
• Disable or limit applications that heavily utilize the card framework module if operationally feasible
• Monitor devices closely for signs of instability while awaiting patch deployment

# Check current HarmonyOS version and security patch level
# Navigate to: Settings > About device > Version
# Ensure security patch level is January 2026 or later