CVE-2026-67976 in Fprime
Summary
by MITRE • 08/04/2026
The Ref::SignalGen component of fprime framework v4.2.2 does not validate the safety of user-controlled parameters, allowing attackers to cause a Denial of Service (DoS) via inputting unsafe parameters.
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Analysis
by VulDB Data Team • 08/04/2026
The vulnerability in the Ref::SignalGen component of the fprime framework version 4.2.2 represents a critical security flaw that undermines system reliability and operational integrity. This component is responsible for generating signals within the framework's architecture, making it a crucial element in the overall system functionality. The absence of proper parameter validation creates an attack surface where malicious actors can manipulate input values to disrupt normal system operations. The fprime framework is widely used in aerospace and embedded systems applications where reliability and safety are paramount, making this vulnerability particularly concerning for mission-critical deployments.
The technical flaw manifests as a lack of input sanitization and validation mechanisms within the Ref::SignalGen component. When users provide parameters to configure signal generation, the system fails to perform adequate checks to ensure these values fall within safe operational boundaries. This absence of validation allows attackers to inject malformed or extreme parameter values that can cause the signal generation process to fail unpredictably. The vulnerability operates at the input processing level where user-provided data transitions from external interfaces into internal system operations without proper boundary checking or range validation.
The operational impact of this vulnerability extends beyond simple service disruption to potentially compromising the entire system stability. An attacker capable of exploiting this weakness can induce a denial of service condition that may affect signal generation capabilities across multiple subsystems dependent on the fprime framework. In aerospace applications, this could result in communication failures, navigation system disruptions, or sensor data corruption that directly impacts mission success and safety. The DoS condition can be persistent and difficult to recover from, as it may require system restarts or manual intervention to restore normal signal generation functionality.
Mitigation strategies for this vulnerability should focus on implementing comprehensive input validation mechanisms within the Ref::SignalGen component. Security controls must include parameter range checking, data type validation, and boundary constraint enforcement to prevent unsafe values from being processed. The framework should incorporate defensive programming practices that validate all user-controlled inputs before processing them in signal generation operations. Additionally, implementing proper error handling and graceful degradation mechanisms can help maintain system availability even when malicious input is detected. Organizations using fprime framework should prioritize upgrading to patched versions and implementing runtime monitoring to detect anomalous parameter usage patterns that may indicate exploitation attempts.
This vulnerability aligns with CWE-20, which describes improper input validation, and reflects common weaknesses in software security practices where basic sanitization checks are omitted from critical processing components. From an attack perspective, this represents a low-effort, high-impact vector that fits within the ATT&CK framework's privilege escalation and denial of service categories. The vulnerability demonstrates how seemingly simple parameter handling can create significant security risks in embedded systems where reliability requirements are stringent and failure consequences are severe.