FC-SWILS Parser Stack Overflow Vulnerability Summary Vulnerability Overview In Wireshark's protocol parser, the function contains a stack overflow vulnerability. When processing specific capture files, it can cause the program to crash. Impact Scope SIGSEGV Crash: When running Wireshark on systems with small stack space (e.g., with or default Linux configuration), the program will crash. GUI Crash: Opening an affected file using the Wireshark GUI will cause the program to crash (even without the verbose flag enabled). Trigger Condition: Requires specific FC frame sequence reassembly data. Remediation Current Status: Unfixed (Closed status, but no specific patch details provided, only marked as Done). AI Suggestion: The AI assistant (Claude Opus 4.6) noted that the Wireshark GUI will crash, but did not provide root cause analysis or mitigation measures. User Verification: User identified this bug using Claude Opus 4.6, but did not verify the root cause or mitigation method. POC / Exploit Code 1. Test File Generation Script ( ) 2. Reproduction Command 3. Crash Output Example 4. Wireshark GUI Crash Log