CVE-2026-92152 in F Prime
Summary
by MITRE • 10/14/2026
F´ (F Prime) is a framework that enables development and deployment of spaceflight and other embedded software applications. From 4.1.0 until 4.2.0, Svc::GenericHub output-port dispatch is vulnerable because the deserialized port field is passed to serialOut_out, bufferOut_out, eventOut_out, or tlmOut_out without an explicit range check. When a remote hub packet supplies a port index outside the configured output-port array, assert-enabled builds abort, while builds without assertions can access an output-port array out of bounds, corrupt heap memory, and potentially allow remote code execution. This issue is fixed in version 4.2.0.
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Analysis
by VulDB Data Team • 10/14/2026
The F Prime framework serves as a critical infrastructure for developing and deploying embedded software applications within spaceflight systems and other resource-constrained environments. A significant security vulnerability was identified in the Svc::GenericHub component, specifically affecting versions ranging from 4.1.0 through 4.2.0. This flaw centers on the handling of output-port dispatch operations, where the framework processes incoming data to route messages to specific destination ports based on indices provided within remote hub packets. The core technical deficiency lies in the absence of explicit range validation for these port indices before they are utilized as array subscripts or pointers during serialization and deserialization processes.
When a remote hub packet arrives containing a port index that falls outside the bounds of the configured output-port array, the system fails to validate this input against the valid range of available ports. In builds compiled with assertions enabled, which are typically used for development and testing phases, this invalid access triggers an assertion failure resulting in an immediate application abort or crash. While this behavior prevents further exploitation by terminating the process, it still constitutes a denial-of-service vector if triggered remotely. However, the severity escalates dramatically in production builds where assertions are disabled to optimize performance. In these configurations, the unchecked port index is passed directly to functions such as serialOut_out, bufferOut_out, eventOut_out, or tlmOut_out without boundary checks.
This lack of validation leads to an out-of-bounds memory access scenario classified under CWE-125: Out-of-bounds Read and CWE-787: Out-of-bounds Write depending on the specific operation performed by the target function. By accessing memory locations outside the allocated output-port array, the application can corrupt heap metadata or overwrite adjacent data structures in memory. Such memory corruption is particularly dangerous as it destabilizes the runtime environment of the embedded system and creates opportunities for advanced exploitation techniques. An attacker who can inject maliciously crafted hub packets into the network traffic targeting this component could potentially leverage these out-of-bounds accesses to achieve remote code execution, thereby gaining control over the spaceflight or embedded device software stack.
From a threat modeling perspective, this vulnerability aligns with ATT&CK technique T1059: Command and Scripting Interpreter if exploitation leads to command execution, and it represents a classic input validation failure that compromises the integrity of the system's memory state. The impact extends beyond simple data corruption; in critical infrastructure like space missions, such vulnerabilities can lead to mission-critical failures, loss of telemetry control, or unauthorized modification of flight software parameters. The absence of strict boundary checks on deserialized inputs is a common pattern in embedded systems that prioritize performance over rigorous security validation during the serialization pipeline.
The issue has been addressed and resolved in version 4.2.0 of the F Prime framework by implementing proper range checking for port indices before they are used to access output-port arrays. This fix ensures that any index received from a remote hub packet is validated against the maximum number of configured ports, preventing out-of-bounds accesses regardless of whether assertions are enabled or disabled in the build configuration. Organizations utilizing versions 4.1.0 through 4.2.0 should prioritize upgrading to version 4.2.0 or later to mitigate this risk. Additionally, until an upgrade is feasible, implementing network-level filtering rules to restrict access to hub communication ports and enabling assertion-based builds during any operational testing phases can provide partial mitigation against exploitation attempts that rely on triggering memory corruption vulnerabilities.