{"action":"Upgrade mruby to 2.1.2-r0 or later.","affected":[{"fixed":"2.1.2-r0","introduced":"0"}],"component":"mruby","cve_ids":[],"ecosystem":"Alpine","ecosystem_qualifier":"Alpine:v3.22","exploited":false,"fixed_versions":["2.1.2-r0"],"id":"tcs_01M6GM0572SF7MP67JT8S0FV66","modified_at":"2026-11-03T06:32:23.982426771Z","published_at":"2020-07-21T15:15:14.537Z","references":["https://osv.dev/vulnerability/ALPINE-CVE-2020-15866","https://security.alpinelinux.org/vuln/CVE-2020-15866"],"severity":{"label":"critical","score":9.8},"sources":[{"source":"osv","source_id":"ALPINE-CVE-2020-15866#Alpine:v3.22/mruby","url":"https://osv.dev/vulnerability/ALPINE-CVE-2020-15866"}],"summary":"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."}