CVE-2025-58303 is a use-after-free (UAF) vulnerability classified under CWE-362 (Race Condition) found in the screen recording framework module of Huawei's HarmonyOS. This vulnerability arises from improper synchronization when multiple threads or processes concurrently access shared resources, leading to a race condition that frees memory prematurely while it is still in use. The flaw affects HarmonyOS versions 5.0.1, 5.1.0, and 6.0.0. The CVSS 3.1 base score of 8.4 indicates a high severity, with an attack vector of local (AV:L), low attack complexity (AC:L), no privileges required (PR:N), and no user interaction needed (UI:N). The scope is unchanged (S:U), but confidentiality, integrity, and availability impacts are all high (C:H/I:H/A:H). Exploiting this vulnerability could allow an attacker to execute arbitrary code, corrupt memory, or cause denial of service by crashing the screen recording service or the entire system. Since the screen recording framework is a core multimedia component, its compromise could lead to unauthorized access to sensitive screen content or disruption of device functionality. No patches or known exploits are currently reported, but the vulnerability was reserved in August 2025 and published in November 2025, indicating recent discovery. The lack of required privileges or user interaction makes this vulnerability particularly dangerous in environments where untrusted applications or processes can invoke screen recording features. The race condition nature implies that exploitation may require precise timing but remains feasible given the low complexity rating.

For European organizations, the impact of CVE-2025-58303 could be significant, especially for those relying on Huawei devices running affected HarmonyOS versions. The vulnerability can lead to denial of service by crashing the screen recording framework or the entire device, affecting availability of critical communication and operational tools. Additionally, the potential for memory corruption or arbitrary code execution threatens confidentiality and integrity, risking unauthorized data access or manipulation. This is particularly concerning for sectors handling sensitive information such as government, finance, healthcare, and telecommunications. Disruption of device functionality could impair business continuity and operational efficiency. Furthermore, given Huawei's role in telecommunications infrastructure, exploitation could have cascading effects on network reliability and security. The local attack vector means that attackers would need some level of access to the device, but no privileges or user interaction are required, increasing risk from insider threats or malicious applications. The absence of known exploits currently provides a window for proactive mitigation, but the high severity demands urgent attention.

Since no patches are currently available, European organizations should implement interim mitigations to reduce risk. These include restricting or disabling screen recording features on Huawei devices where not essential, especially in sensitive environments. Employ application whitelisting and strict access controls to limit which processes can invoke screen recording APIs. Monitor system logs and behavior for anomalies related to the screen recording framework, such as crashes or unexpected resource usage. Encourage users to avoid installing untrusted applications that might exploit this vulnerability. Network segmentation can limit lateral movement if a device is compromised. Once Huawei releases patches, organizations must prioritize timely deployment. Additionally, conduct security awareness training to inform users about the risks of unauthorized screen recording or suspicious app behavior. For critical infrastructure, consider device inventory audits to identify and isolate affected HarmonyOS versions. Collaborate with Huawei and cybersecurity vendors for threat intelligence updates and exploit detection tools.