This vulnerability involves the handling of malformed or out-of-sequence frames within the Aviation Very High Frequency Link Control X.25 layers of the ATN-B1 CPDLC system. Such frames cause repeated resets of the system, potentially leading to increased operator workload and reduced situational awareness. The vulnerability can be exploited remotely via radio frequency. The CVSS 4.0 base score is 6.0, indicating medium severity, with network attack vector, high attack complexity, low privileges required, and no user interaction needed. No official remediation or patch is currently documented.

Exploitation causes repeated resets in the affected communication layers, which may increase operator workload and reduce situational awareness. This could degrade the operational effectiveness of the CPDLC system but does not indicate direct compromise or data loss. The attack can be conducted remotely over radio frequency.

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or temporary mitigation has been documented at this time.