CVE-2026-24922 identifies a heap-based buffer overflow vulnerability classified under CWE-122 within the HDC (Huawei Device Connector) module of Huawei's HarmonyOS, specifically version 6.0.0. This vulnerability arises when the software improperly manages memory allocation on the heap, allowing an attacker with local access and high privileges to overflow a buffer, potentially overwriting adjacent memory. The exploitation requires user interaction, such as executing a crafted application or triggering a specific system action. The consequence of successful exploitation primarily affects system availability, potentially causing crashes or denial-of-service conditions, but also impacts confidentiality and integrity to a lesser extent. The CVSS 3.1 score of 6.9 reflects a medium severity level, with an attack vector classified as local (AV:L), low attack complexity (AC:L), requiring high privileges (PR:H), and user interaction (UI:R). The scope is changed (S:C), indicating that the vulnerability can affect resources beyond the vulnerable component. No patches are currently published, and no known exploits have been observed in the wild, suggesting the vulnerability is newly disclosed and not yet weaponized. The HDC module is critical for device communication and management within HarmonyOS, making this vulnerability significant for device stability and security.

For European organizations, the primary impact of CVE-2026-24922 lies in potential availability disruptions of devices running HarmonyOS 6.0.0, which could affect operational continuity, especially in environments where Huawei devices are integrated into critical infrastructure or enterprise ecosystems. The vulnerability could lead to denial-of-service conditions, impacting user productivity and service reliability. Although confidentiality and integrity impacts are rated lower, the possibility of memory corruption could be leveraged in multi-stage attacks if combined with other vulnerabilities. Organizations relying on Huawei's HarmonyOS for IoT, mobile, or embedded systems may face increased risk, particularly if devices operate in sensitive or high-availability contexts. The requirement for local high-privilege access and user interaction limits remote exploitation but does not eliminate insider threat or targeted attack scenarios. The absence of known exploits reduces immediate risk but underscores the need for proactive mitigation.

1. Monitor Huawei's official channels for patches addressing CVE-2026-24922 and apply updates promptly once available. 2. Restrict local high-privilege access to HarmonyOS devices, enforcing strict access controls and least privilege principles. 3. Implement application whitelisting and user activity monitoring to detect and prevent execution of untrusted or malicious code requiring user interaction. 4. Conduct regular security audits and vulnerability assessments on HarmonyOS deployments to identify potential exposure. 5. Employ endpoint detection and response (EDR) solutions capable of identifying anomalous behavior related to memory corruption or buffer overflow attempts. 6. Educate users on the risks of interacting with untrusted applications or prompts that could trigger exploitation. 7. For critical environments, consider network segmentation to isolate HarmonyOS devices and limit potential lateral movement. 8. Develop incident response plans specific to HarmonyOS vulnerabilities to ensure rapid containment and recovery.