CVE-2025-43283 is a vulnerability identified in Apple macOS, specifically addressed in the macOS Tahoe 26 release. The issue stems from an out-of-bounds read condition caused by insufficient bounds checking in the affected system component. This type of flaw is classified under CWE-125, which involves improper validation of array indices or memory boundaries. An application running with limited privileges (local access) can exploit this vulnerability to cause unexpected system termination, effectively crashing the operating system. The vulnerability does not allow for unauthorized data disclosure or modification, focusing solely on availability disruption. The CVSS v3.1 base score is 3.3, indicating low severity, with the vector AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L, meaning local attack vector, low attack complexity, requires privileges, no user interaction, unchanged scope, and impacts only availability. No known exploits have been reported in the wild, and the affected macOS versions are unspecified but fixed in the latest Tahoe 26 update. The vulnerability highlights the importance of robust bounds checking in system-level code to prevent stability issues caused by malicious or malformed applications.

For European organizations, the primary impact of CVE-2025-43283 is on system availability. Organizations relying on macOS for critical operations could face unexpected system crashes, leading to potential downtime and disruption of business processes. While the vulnerability does not compromise confidentiality or integrity, repeated or targeted exploitation could degrade user trust and operational efficiency. Sectors such as finance, healthcare, and government agencies that use macOS devices for sensitive or critical tasks may experience interruptions. Additionally, organizations with large macOS deployments could face increased support and remediation costs. However, the requirement for local privileges limits remote exploitation, reducing the risk of widespread attacks. The absence of known exploits in the wild further lowers immediate risk but does not eliminate the need for proactive patching and monitoring.

To mitigate CVE-2025-43283, organizations should promptly update all macOS devices to macOS Tahoe 26 or later, where the vulnerability is fixed. Implement strict application control policies to limit the execution of untrusted or unnecessary applications, reducing the risk of local exploitation. Employ endpoint protection solutions capable of detecting abnormal application behavior that could lead to system crashes. Regularly audit user privileges to ensure that only authorized personnel have local access rights capable of triggering this vulnerability. Incorporate system stability monitoring to quickly identify and respond to unexpected terminations. Additionally, maintain comprehensive backup and recovery procedures to minimize operational impact in case of system crashes. Educate users about the risks of running unverified applications and enforce security best practices for software installation and execution.