CVE-2026-28537 is a double free vulnerability classified under CWE-415 found in the window module of Huawei's HarmonyOS 6.0.0. A double free occurs when a program attempts to free the same memory location twice, leading to undefined behavior such as memory corruption, crashes, or potential exploitation. In this case, the vulnerability affects system availability by causing denial of service conditions when exploited. The CVSS 3.1 base score is 5.1, reflecting medium severity with the vector AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H, indicating local attack vector, high attack complexity, no privileges required, no user interaction, unchanged scope, no confidentiality or integrity impact, but high impact on availability. The vulnerability is currently published but lacks known exploits or patches. The root cause is improper memory management in the window module, which is critical for graphical interface operations. Exploiting this flaw requires local access and is difficult due to high complexity, limiting widespread exploitation. However, successful exploitation can disrupt device operation, causing system crashes or reboots. This vulnerability is relevant for devices running HarmonyOS 6.0.0, which is primarily deployed on Huawei smartphones, tablets, and IoT devices. Given the lack of patches, organizations should monitor for updates and implement compensating controls to reduce risk.

The primary impact of CVE-2026-28537 is on system availability, potentially causing denial of service through crashes or instability in devices running HarmonyOS 6.0.0. This can disrupt user operations, degrade service reliability, and impact business continuity for organizations relying on Huawei devices. Since confidentiality and integrity are not affected, data breaches or unauthorized data modification are unlikely. However, availability loss can affect critical applications, especially in environments where Huawei devices are integral to operations or IoT deployments. The requirement for local access and high attack complexity reduces the likelihood of remote exploitation but does not eliminate insider threats or attacks on physically accessible devices. The absence of known exploits limits immediate risk, but the vulnerability could be targeted once exploit code becomes available. Enterprises and service providers using HarmonyOS devices should consider the potential for service interruptions and plan accordingly.

1. Monitor Huawei security advisories closely and apply official patches promptly once released to address this vulnerability. 2. Restrict local access to devices running HarmonyOS 6.0.0 by enforcing strong physical security controls and limiting user privileges to trusted personnel only. 3. Implement device usage policies that minimize exposure to untrusted users or environments where local exploitation could occur. 4. Employ runtime protection mechanisms or memory safety tools if available on HarmonyOS to detect or prevent double free conditions. 5. Monitor system logs and device behavior for signs of crashes or instability that could indicate exploitation attempts. 6. For organizations deploying HarmonyOS in critical infrastructure or IoT, consider network segmentation and device isolation to contain potential denial of service impacts. 7. Educate users and administrators about the risks of local exploitation and the importance of timely updates. 8. Evaluate alternative platforms or versions if immediate patching is not feasible and the risk is unacceptable.