CVE-2026-24918: Huawei EMUI DOS Vulnerability

CVE-2026-24918 Overview

CVE-2026-24918 is an address read vulnerability discovered in the communication module of Huawei EMUI and HarmonyOS operating systems. This vulnerability allows a local attacker with low privileges to trigger improper memory access operations, potentially leading to a denial of service condition affecting system availability.

The vulnerability is classified under CWE-476 (NULL Pointer Dereference), indicating that the communication module fails to properly validate memory addresses before read operations, which can result in application crashes or system instability when exploited.

Critical Impact

Successful exploitation of this vulnerability may cause denial of service conditions, affecting the availability of affected Huawei devices running EMUI 15.0.0 and multiple HarmonyOS versions.

Affected Products

• Huawei EMUI 15.0.0
• Huawei HarmonyOS 4.3.1, 5.1.0, 5.1.1, and 6.0.0
• Multiple Huawei device categories including smartphones, laptops, vision products, and wearables

Discovery Timeline

• February 6, 2026 - CVE-2026-24918 published to NVD
• February 10, 2026 - Last updated in NVD database

Technical Details for CVE-2026-24918

Vulnerability Analysis

This vulnerability exists within the communication module of Huawei's mobile operating systems. The flaw involves improper handling of memory addresses during read operations, where the module fails to validate that a pointer references a valid memory location before attempting to access it. When a null or invalid pointer is dereferenced, the system experiences an unrecoverable error condition.

The attack requires local access to the device, meaning an attacker must have either physical access or the ability to execute code on the target system. While the vulnerability does not allow for data theft (no confidentiality impact) or system modification (no integrity impact), it can effectively render the device unresponsive or force a system restart, disrupting normal operation.

Root Cause

The root cause of CVE-2026-24918 is a NULL Pointer Dereference (CWE-476) condition in the communication module. This occurs when the software attempts to use a pointer that it expects to be valid but is actually null or points to an invalid memory region. The communication module lacks adequate bounds checking and pointer validation before performing memory read operations, allowing malformed inputs or specific system states to trigger the vulnerability.

Attack Vector

The attack vector for this vulnerability is local, requiring an attacker to have low-privileged access to the affected device. Exploitation does not require user interaction beyond the initial local access. An attacker could potentially trigger the vulnerability through:

• Crafted inter-process communication (IPC) messages to the communication module
• Manipulation of communication module configuration or state
• Triggering specific edge-case conditions in the communication handling routines

Due to the nature of the vulnerability, no verified proof-of-concept code or exploitation techniques have been publicly disclosed. The vulnerability manifests when the communication module processes requests that result in an invalid memory address being read. For technical implementation details, refer to the Huawei Consumer Security Bulletin.

Detection Methods for CVE-2026-24918

Indicators of Compromise

• Unexpected application crashes or system reboots related to communication services
• Repeated error messages or logs indicating memory access violations in communication modules
• Unusual system behavior or performance degradation in network-related functions

Detection Strategies

• Monitor device logs for NULL pointer dereference exceptions or segmentation faults in communication-related processes
• Implement system monitoring for abnormal process termination patterns in EMUI or HarmonyOS communication services
• Review system crash dumps for evidence of memory access violations in the communication module

Monitoring Recommendations

• Enable enhanced logging on affected devices to capture communication module errors and exceptions
• Implement device management solutions to centrally monitor fleet health and detect anomalous crash patterns
• Establish baseline behavior metrics for system stability to identify deviations that may indicate exploitation attempts

How to Mitigate CVE-2026-24918

Immediate Actions Required

• Check and apply the latest security updates from Huawei for all affected EMUI and HarmonyOS devices
• Review device inventory to identify all systems running vulnerable versions (EMUI 15.0.0, HarmonyOS 4.3.1, 5.1.0, 5.1.1, or 6.0.0)
• Limit local access to devices where possible to reduce the attack surface
• Enable automatic updates to ensure future security patches are applied promptly

Patch Information

Huawei has addressed this vulnerability in their February 2026 security bulletin. Users should apply the latest firmware updates through their device's system update functionality. Detailed patch information is available in the following security bulletins:

• Huawei Consumer Security Bulletin
• Huawei Laptops Security Bulletin
• Huawei Vision Security Bulletin
• Huawei Wearables Security Bulletin

Workarounds

• Restrict physical access to affected devices until patches can be applied
• Limit installation of untrusted applications that could potentially trigger the vulnerability
• For enterprise environments, implement mobile device management (MDM) policies to enforce security configurations
• Monitor device behavior and investigate any unexpected crashes or restarts

# Check current EMUI/HarmonyOS version on affected devices
# Navigate to: Settings > About phone > Software version
# Ensure the security patch level is February 2026 or later

# For enterprise deployments, verify patch status across device fleet
# using your MDM solution's compliance reporting features