{"id":"CVE-2020-15866","details":"mruby through 2.1.2-rc has a heap-based buffer overflow in the mrb_yield_with_class function in vm.c because of incorrect VM stack handling. It can be triggered via the stack_copy function.","modified":"2026-07-08T05:55:46.035239315Z","published":"2020-07-21T15:15:14.537Z","database_specific":{"unresolved_ranges":[{"cpes":["cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*"],"extracted_events":[{"introduced":"9.0"},{"last_affected":"9.0"}],"source":"CPE_STRING","vendor_product":"debian:debian_linux"}]},"references":[{"type":"ADVISORY","url":"https://lists.debian.org/debian-lts-announce/2022/05/msg00006.html"},{"type":"EVIDENCE","url":"https://github.com/mruby/mruby/issues/5042"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/mruby/mruby","events":[{"introduced":"0"},{"last_affected":"f9d113f7647121f8578742a2a9ac256ece365e3f"},{"introduced":"b6b9c57f247a26fb5dbea129cd81fcc9b7d485a3"},{"last_affected":"b6b9c57f247a26fb5dbea129cd81fcc9b7d485a3"}],"database_specific":{"source":["CPE_RANGE","CPE_STRING"],"cpe":["cpe:2.3:a:mruby:mruby:*:*:*:*:*:*:*:*","cpe:2.3:a:mruby:mruby:2.1.2:rc:*:*:*:*:*:*"],"extracted_events":[{"introduced":"0"},{"last_affected":"2.1.1"},{"introduced":"2.1.2-rc"},{"last_affected":"2.1.2-rc"}]}}],"versions":["2.1.2-rc","2.1.1","2.1.1-rc2","2.1.1-rc","1.2.0","1.1.0","1.0.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2020-15866.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"}]}