{"id":"CVE-2018-12247","details":"An issue was discovered in mruby 1.4.1. There is a NULL pointer dereference in mrb_class, related to certain .clone usage, because mrb_obj_clone in kernel.c copies flags other than the MRB_FLAG_IS_FROZEN flag (e.g., the embedded flag).","modified":"2026-05-17T11:54:15.921943936Z","published":"2018-06-12T14:29:00.320Z","database_specific":{},"references":[{"type":"REPORT","url":"https://github.com/mruby/mruby/issues/4036"},{"type":"FIX","url":"https://github.com/mruby/mruby/commit/55edae0226409de25e59922807cb09acb45731a2"}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"}]}