Key Information Title: libav avconv 13 && the newest master Double-free Description: A double-free memory corruption issue exists in the cleanup phase of the DSS (Digital Speech Standard) demuxer, causing program termination. Reproduction Steps: - Run the command: to trigger the issue. Environment Details: - version: 13_dev0, Copyright (c) 2000-2018 Libav developers - Build time: July 19, 2025, 14:57:50 - Ubuntu clang version: 16.0.6 - Configuration options: Includes , , , etc. Related Library Versions: - : 56.8.0 - : 58.12.1 - : 58.2.0 - : 57.0.2 - : 7.1.0 - : 4.0.0 - : 5.0.1 Error Messages: - - Metadata: - Author: π0 - Date: 2000-32-00T32768:341855643:352951808 - Comments: None