A heap-buffer-overflow vulnerability has been identified in the Tarantool software, specifically in the mmcall function. This issue was reported by OSS-Fuzz and involves an 8-byte write overflow. The vulnerability is considered high severity but no CVSS score is provided. The affected versions include those at or after commit 8c7cfb1cd0b3f5ce1d5b181403f68f7aaf657d9a. There is no information on available patches or exploits in the wild.