CVE-2026-101175 in HarmonyOS
Summary
by MITRE • 11/02/2026
Null pointer dereference vulnerability in the ArkWeb module. Impact: Successful exploitation of this vulnerability may affect availability.
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Analysis
by VulDB Data Team • 11/02/2026
The identified null pointer dereference vulnerability within the ArkWeb module represents a critical memory management flaw that poses a significant risk to system stability and service continuity. As an experienced security analyst, it is evident that this defect stems from improper validation of input data or internal state checks before accessing a memory address expected to contain valid object references. When the application attempts to dereference a pointer that holds a null value instead of a legitimate memory location, the operating system's memory protection mechanisms intervene by terminating the process immediately. This behavior is characteristic of CWE-476, which classifies errors related to NULL Pointer Dereferences where software fails to check for null pointers before using them, leading to unexpected termination or crashes rather than allowing continued execution with potentially compromised data integrity.
From an operational perspective, the primary impact of this vulnerability is on availability, as described in the initial report. A successful exploitation does not necessarily imply remote code execution or privilege escalation at this stage but instead results in a denial-of-service condition for users interacting with the ArkWeb module. Attackers can trigger this flaw by supplying specifically crafted inputs that cause internal variables to resolve to null values during critical processing stages. This forces the application into an unrecoverable error state, requiring manual intervention or automatic restart mechanisms to restore service. In environments where high availability is paramount, such as web browsing applications or embedded systems relying on ArkWeb for rendering content, repeated exploitation can lead to significant downtime and operational disruption.
This vulnerability aligns with several entries in the MITRE ATT&CK framework, particularly those related to resource exhaustion and denial of service techniques. By exploiting this flaw, an adversary could disrupt normal operations without needing elevated privileges or complex exploit chains beyond simple input manipulation. The lack of robust error handling means that even unauthenticated users might leverage this weakness if the vulnerable code path is exposed through public-facing interfaces or user-controllable features within the ArkWeb module. It highlights a broader issue in software development where defensive programming practices, such as rigorous null checks and exception handling, are either overlooked or insufficiently implemented during the coding phase.
To mitigate this vulnerability, developers must implement strict input validation and ensure that all pointer dereferences are preceded by explicit checks for null values. Integrating static analysis tools into the continuous integration pipeline can help identify these patterns early in the development lifecycle before they reach production environments. Additionally, employing fuzzing techniques against the ArkWeb module can uncover edge cases where memory management fails under unusual input conditions. Patching should prioritize adding defensive code blocks that gracefully handle unexpected null states by logging errors and returning safe default values or error codes rather than crashing. Regular security audits focusing on CWE-476 patterns will further strengthen the resilience of the application against similar future vulnerabilities, ensuring sustained availability and reliability for end-users.