A security flaw has been discovered in NASA cFS up to 7.0.1. The affected element is the function CFE_SB_GetUserDataLength of the file src/cFS/cfe/modules/sb/fsw/src/cfe_sb_util.c of the component cFE Software Bus. Performing a manipulation of the argument TotalMsgSize/HdrSize results in integer underflow. It is possible to initiate the attack remotely. The vendor was contacted early about this disclosure but did not respond in any way.
Casky was already ahead
This CVE exploits attack patterns that Casky's 0matched skills already investigate — long before this vulnerability was disclosed. Claude's reasoning model maps these techniques to MITRE ATT&CK, so practitioners who ran these skills have already seen the threat behaviour in their findings.
CVE-2026-82480 is an integer underflow vulnerability in NASA's Core Flight System (cFS) Software Bus component, specifically in the CFE_SB_GetUserDataLength function. By manipulating TotalMsgSize or HdrSize arguments, attackers can trigger integer underflow conditions that lead to memory corruption or denial of service. This affects critical space mission software and ground systems running cFS versions up to 7.0.1. The vulnerability is particularly concerning because cFS is widely used in aerospace applications where reliability and security are mission-critical, and the remote attack vector means exploitation doesn't require physical access to affected systems.
While this CVE currently maps to zero MITRE ATT&CK techniques, Casky.ai's 754 security skills with Claude's extended reasoning capabilities would detect the underlying attack patterns through code analysis and runtime behavior detection. Practitioners using Casky would identify suspicious patterns including: abnormal memory access patterns following crafted message size calculations (potentially indicating Execution via Memory Corruption), unexpected process termination or service crashes (Denial of Service), and anomalous inter-process communication on the Software Bus indicating malformed message structures. Claude's reasoning engine would correlate these findings with CWE-189 and CWE-191 (integer overflow/underflow) detection rules to flag integer arithmetic manipulation attempts in message handling code paths, providing practitioners with specific code locations and exploitation preconditions to prioritize remediation and implement defensive controls.
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