CVE-2025-58314 is a vulnerability classified under CWE-125 (Out-of-bounds Read) found in the driver module of Huawei's HarmonyOS. This flaw allows an attacker with limited privileges on the device to read memory outside the intended bounds, potentially exposing sensitive information stored in adjacent memory regions. The vulnerability affects a broad range of HarmonyOS versions, from 2.0.0 up to 6.0.0, indicating a long-standing issue across multiple releases. The technical root cause lies in improper bounds checking within the driver component, which fails to validate memory access requests correctly. Successful exploitation can lead to unauthorized disclosure of confidential data (high confidentiality impact) and may also degrade system availability (low integrity and availability impact). The CVSS 3.1 vector (AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:L) indicates that the attack requires local access with low complexity and privileges, but no user interaction is needed. Currently, there are no known exploits in the wild, and Huawei has not published patches at the time of this report. This vulnerability is particularly concerning for environments where HarmonyOS devices are used in critical infrastructure or sensitive data processing, as attackers could leverage it to extract confidential information or cause service disruptions.

For European organizations, the primary impact of CVE-2025-58314 is the potential exposure of sensitive data due to the out-of-bounds read, which compromises confidentiality. This is especially critical for sectors relying on Huawei HarmonyOS devices, such as telecommunications, IoT deployments, and smart devices integrated into enterprise environments. The availability impact, while lower, could still disrupt services if exploited to cause system instability or crashes. Given the local access requirement, the threat is more relevant in scenarios where attackers have physical or logical access to devices, such as insider threats or compromised endpoints. The broad range of affected HarmonyOS versions increases the attack surface for organizations that have not updated or replaced legacy devices. The absence of patches heightens the risk until mitigations are implemented. Confidentiality breaches could lead to data leaks, regulatory non-compliance (e.g., GDPR), and reputational damage. Availability issues could affect operational continuity, particularly in telecom networks and critical infrastructure relying on HarmonyOS-powered equipment.

1. Implement strict access controls and device hardening to limit local access to trusted users only, reducing the risk of exploitation. 2. Monitor system and driver behavior for anomalies indicative of out-of-bounds memory access attempts, using advanced endpoint detection and response (EDR) tools. 3. Segregate HarmonyOS devices in network segments with limited exposure to reduce lateral movement opportunities. 4. Enforce least privilege principles on user accounts and processes to minimize the privileges available to potential attackers. 5. Maintain an inventory of all HarmonyOS devices and their versions to prioritize patching and mitigation efforts once Huawei releases updates. 6. Engage with Huawei support channels to obtain early access to patches or workarounds. 7. Consider deploying host-based intrusion prevention systems (HIPS) that can detect and block suspicious driver-level activities. 8. Educate internal teams about the risks of local access vulnerabilities and enforce physical security measures to prevent unauthorized device access. 9. Prepare incident response plans specifically addressing potential confidentiality breaches and availability disruptions related to this vulnerability.