CVE-2026-28551 Overview
CVE-2026-28551 is a race condition vulnerability in the device security management module of Huawei HarmonyOS. The flaw affects HarmonyOS versions 5.1.0 and 6.0.0. Successful exploitation may affect device availability, leading to denial-of-service conditions on impacted devices.
The vulnerability is categorized under [CWE-362] (Concurrent Execution using Shared Resource with Improper Synchronization). Exploitation requires local access with low privileges and no user interaction, though attack complexity is high. The EPSS data indicates a low probability of exploitation in the near term.
Critical Impact
Local attackers with low privileges can trigger a race condition in the device security management module, resulting in degraded availability on HarmonyOS 5.1.0 and 6.0.0 devices.
Affected Products
- Huawei HarmonyOS 5.1.0
- Huawei HarmonyOS 6.0.0
- Device security management module component
Discovery Timeline
- 2026-03-05 - CVE-2026-28551 published to NVD
- 2026-03-05 - Huawei publishes security bulletin 2026/3
- 2026-03-05 - Last updated in NVD database
Technical Details for CVE-2026-28551
Vulnerability Analysis
The vulnerability resides within the device security management module of HarmonyOS. A race condition occurs when multiple threads or processes access shared resources without proper synchronization. The improper sequencing of operations allows a local attacker to interfere with normal module execution.
When the timing window is met, the module enters an inconsistent state. This affects the availability of device security functions and can cause service disruption. The issue is constrained to local attack vectors, meaning remote exploitation is not possible.
Exploitation requires the attacker to already have low-privileged code execution on the device. The high attack complexity reflects the precise timing required to win the race condition reliably.
Root Cause
The root cause is improper synchronization of concurrent operations within the device security management module. Shared resources are accessed without adequate locking or atomic operation enforcement. This creates a Time-of-Check Time-of-Use (TOCTOU) style window where state can be manipulated between validation and use.
Attack Vector
The attack vector is local. An attacker must execute code on the target HarmonyOS device with low privileges. By triggering concurrent calls to the affected module, the attacker manipulates the timing window to force the module into an unavailable state. No user interaction is required.
No verified proof-of-concept exploitation code is publicly available. Refer to the Huawei Security Bulletin 2026/3 for vendor-supplied technical details.
Detection Methods for CVE-2026-28551
Indicators of Compromise
- Unexpected crashes or restarts of the device security management module on HarmonyOS 5.1.0 or 6.0.0 devices
- System logs showing concurrent access failures or synchronization errors in security service components
- Repeated invocation patterns from a single local process targeting device security management APIs
Detection Strategies
- Monitor HarmonyOS device logs for abnormal termination events tied to the security management module
- Audit installed applications for unusual API call frequencies against device security interfaces
- Track availability metrics for device security services and alert on repeated degradation events
Monitoring Recommendations
- Enable verbose logging for the device security management module where supported by HarmonyOS
- Centralize mobile device telemetry into a SIEM for correlation across endpoints
- Establish baselines for normal module behavior and alert on deviations consistent with race condition exploitation
How to Mitigate CVE-2026-28551
Immediate Actions Required
- Apply the security updates referenced in the Huawei Security Bulletin 2026/3 to all affected HarmonyOS 5.1.0 and 6.0.0 devices
- Inventory HarmonyOS devices in your environment and prioritize patching of those running the affected versions
- Restrict installation of untrusted third-party applications that could provide local attack footholds
Patch Information
Huawei has published fix information through its monthly security bulletin process. Consult the Huawei Security Bulletin 2026/3 and the Huawei Laptops Security Bulletin 2026/3 for version-specific update guidance.
Workarounds
- Limit local code execution by enforcing strict application vetting and removing unused or untrusted apps
- Apply mobile device management (MDM) policies to restrict installation sources to trusted vendors
- Reduce privileges granted to applications that interact with device security management interfaces
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
