CVE-2025-64313 identifies a race condition vulnerability (CWE-362) in Huawei's HarmonyOS office service component, present in versions 5.0.1, 5.1.0, and 6.0.0. The flaw stems from improper synchronization when multiple threads or processes concurrently access shared resources, leading to inconsistent states or resource conflicts. This can be exploited to trigger a denial of service (DoS) condition, causing the affected service to crash or become unresponsive, thereby impacting system availability. The vulnerability requires local access (AV:L) and user interaction (UI:R) but no privileges (PR:N), indicating that an attacker must have some level of user access and induce the condition via interaction. The CVSS vector indicates low attack complexity (AC:L) and unchanged scope (S:U), with limited impact on confidentiality and integrity but a notable impact on availability (A:L). No known exploits have been reported in the wild, and no patches have been released at the time of publication. The vulnerability is significant for environments relying on HarmonyOS, especially where the office service is critical for operations. The race condition nature suggests that timing and concurrency control are the root causes, which typically require code fixes to ensure proper locking or atomic operations. Organizations should monitor for unusual office service failures and prepare to deploy patches once available.

For European organizations, this vulnerability primarily threatens the availability of systems running Huawei HarmonyOS, particularly those using the office service. Disruptions could affect productivity and operational continuity, especially in sectors relying on Huawei devices for office or communication tasks. While confidentiality and integrity impacts are limited, denial of service conditions can cause downtime, impacting business processes and potentially leading to financial losses or reputational damage. The requirement for local access and user interaction limits remote exploitation, reducing the risk of widespread attacks but increasing the threat from insider or physically proximate attackers. Organizations with Huawei-based infrastructure or mobile devices in critical roles may face operational challenges if the vulnerability is exploited. The absence of known exploits reduces immediate risk but does not eliminate the need for vigilance. The medium severity indicates a moderate risk level, warranting timely mitigation to prevent service interruptions.

1. Monitor Huawei's official security advisories and apply patches promptly once released to address the race condition in the office service. 2. Restrict local access to devices running affected HarmonyOS versions by enforcing strong physical security controls and limiting user permissions. 3. Educate users to avoid interacting with untrusted applications or content that could trigger the race condition exploit. 4. Implement application whitelisting and endpoint protection to detect anomalous behavior related to the office service. 5. Conduct regular system and service availability monitoring to quickly identify and respond to service disruptions. 6. Where feasible, consider upgrading to HarmonyOS versions not affected by this vulnerability or alternative platforms until patches are available. 7. Employ concurrency testing and code review practices in environments developing or customizing HarmonyOS-based applications to detect similar synchronization issues proactively.