CVE-2026-18064 in Core Flight System Health & Safety Application
Summary
by MITRE • 07/31/2026
An incomplete fix for CVE-2026-15352 in the NASA core Flight System (cFS) Health and Safety (HS) application leaves a separate NULL pointer dereference reachable in versions through 7.0.1. An attacker who can trigger the affected command under specific conditions could cause the HS application to crash, resulting in a denial-of-service condition and processor reset.
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Analysis
by VulDB Data Team • 07/31/2026
The vulnerability identified as CVE-2026-15352 represents a critical flaw within the NASA core Flight System cFS Health and Safety application where an incomplete remediation of a previous security issue has left behind a persistent NULL pointer dereference condition. This flaw specifically affects versions through 7.0.1 of the cFS framework, which is widely utilized in space mission-critical systems and embedded flight software environments. The incomplete nature of the original fix demonstrates a common but dangerous pattern in cybersecurity where remediation efforts fail to address all attack vectors within a complex software system, leaving residual vulnerabilities that can be exploited by malicious actors.
The technical implementation of this vulnerability stems from improper input validation and memory management within the HS application's command processing logic. When specific commands are executed under predetermined conditions, the application fails to properly check for NULL pointer references before attempting to dereference memory addresses. This condition occurs in the health monitoring and safety management subsystem that is responsible for tracking system resources and ensuring proper operational states during flight missions. The flaw operates at a fundamental level within the software's runtime behavior, where inadequate defensive programming practices leave the application susceptible to controlled crashes when processing malformed or unexpected command inputs.
The operational impact of this vulnerability extends beyond simple system instability, presenting significant risks to mission-critical operations in spaceflight environments where reliability and continuous operation are paramount. An attacker who successfully triggers this condition can force the HS application to crash, leading to immediate denial-of-service conditions that may cascade into broader system failures. The resulting processor reset represents a particularly concerning outcome since it could potentially disrupt ongoing mission operations, compromise data integrity, or force the spacecraft into safe mode operations that may limit scientific data collection capabilities. This vulnerability directly impacts the availability and reliability of critical systems that are expected to operate continuously for months or years without intervention.
Mitigation strategies for this vulnerability must address both immediate operational concerns and long-term architectural improvements to prevent similar issues in future releases. Organizations should implement immediate patching procedures that thoroughly validate all command inputs and ensure proper NULL pointer checks are implemented throughout the HS application codebase. The remediation process should follow established cybersecurity frameworks including CWE-476 which specifically addresses NULL pointer dereference vulnerabilities, and should align with ATT&CK framework techniques related to privilege escalation and denial of service. Additionally, comprehensive code reviews must be conducted to identify other potential NULL pointer dereferences within the cFS ecosystem, while implementing automated testing procedures that can detect such conditions during development cycles. System administrators should also establish monitoring protocols that can detect unusual crash patterns or reset events that may indicate exploitation attempts.
The persistence of this vulnerability despite previous remediation efforts highlights the importance of thorough vulnerability assessment and validation processes in mission-critical software development environments. Organizations relying on cFS frameworks must maintain rigorous security testing protocols that include both static code analysis and dynamic runtime evaluation to prevent incomplete fixes from propagating into production systems. This vulnerability serves as a reminder that cybersecurity in complex embedded systems requires continuous vigilance and comprehensive testing methodologies that can identify all potential attack vectors within sophisticated software architectures.