CVE-2026-24927: Huawei EMUI DOS Vulnerability

CVE-2026-24927 Overview

CVE-2026-24927 is an out-of-bounds access vulnerability discovered in the frequency modulation module of Huawei's EMUI and HarmonyOS operating systems. This memory corruption flaw allows a local attacker with low privileges to trigger improper memory access operations, potentially leading to system instability or denial of service conditions on affected mobile devices.

Critical Impact

Successful exploitation of this vulnerability may affect system availability, causing potential device crashes or service disruption on Huawei smartphones and tablets running vulnerable EMUI or HarmonyOS versions.

Affected Products

• Huawei EMUI 14.0.0, 14.2.0, 15.0.0
• Huawei HarmonyOS 4.0.0, 4.2.0, 4.3.0, 4.3.1

Discovery Timeline

• February 6, 2026 - CVE-2026-24927 published to NVD
• February 9, 2026 - Last updated in NVD database

Technical Details for CVE-2026-24927

Vulnerability Analysis

This vulnerability exists within the frequency modulation module, a component responsible for handling radio frequency operations on Huawei devices. The flaw is classified under CWE-416 (Use After Free), indicating that the vulnerability involves accessing memory after it has been freed. When the frequency modulation module processes certain operations, improper bounds checking allows an attacker to access memory outside the intended buffer boundaries.

The attack requires local access to the device and low-level privileges, meaning an attacker would need either physical access or the ability to execute code on the target device through another vector such as a malicious application. No user interaction is required to trigger the vulnerability once the attacker has local access.

Root Cause

The root cause stems from improper memory management within the frequency modulation module. Specifically, the vulnerability involves use-after-free conditions where memory resources are accessed after deallocation, combined with insufficient bounds validation when processing frequency-related data structures. This allows memory operations to occur outside the allocated buffer space, potentially corrupting adjacent memory regions.

Attack Vector

The attack vector is local, requiring the attacker to have existing access to the target Huawei device. An attacker with low privileges could potentially exploit this vulnerability by:

1. Gaining local code execution on the device through a malicious application
2. Crafting specific inputs to the frequency modulation module that trigger the out-of-bounds access
3. Causing the system to access freed memory or read/write beyond buffer boundaries
4. Resulting in denial of service through system instability or crashes

The vulnerability primarily impacts availability rather than confidentiality or integrity, as the out-of-bounds access does not appear to enable data exfiltration or privilege escalation based on available information.

Detection Methods for CVE-2026-24927

Indicators of Compromise

• Unexpected device crashes or reboots, particularly when radio frequency functions are active
• System logs showing memory access violations in frequency modulation related processes
• Abnormal application behavior attempting to interact with radio frequency subsystems

Detection Strategies

• Monitor system logs for kernel panics or memory corruption errors associated with the frequency modulation module
• Implement application sandboxing and behavior analysis to detect malicious apps attempting to exploit hardware subsystems
• Deploy mobile device management (MDM) solutions to track device stability and identify anomalous crash patterns

Monitoring Recommendations

• Enable detailed logging on enterprise-managed Huawei devices to capture memory-related exceptions
• Utilize SentinelOne Singularity Mobile to detect and respond to exploitation attempts targeting mobile OS vulnerabilities
• Regularly audit installed applications to identify potentially malicious software that could serve as an exploitation vector

How to Mitigate CVE-2026-24927

Immediate Actions Required

• Update affected Huawei EMUI and HarmonyOS devices to the latest security patch level as outlined in the February 2026 security bulletin
• Restrict installation of applications from untrusted sources to reduce the risk of local exploitation
• Implement mobile device management policies to enforce security updates across enterprise device fleets

Patch Information

Huawei has addressed this vulnerability in their February 2026 security bulletin. Affected users should update their devices to receive the security patch that corrects the out-of-bounds access issue in the frequency modulation module. Refer to the Huawei Security Bulletin February 2026 for specific patch versions and installation instructions.

Workarounds

• Limit device exposure by restricting which applications can be installed, using enterprise app whitelisting where possible
• Avoid installing applications from unknown or untrusted sources until the device is patched
• Consider temporarily disabling non-essential radio frequency features if operationally feasible and if device functionality allows