{"id":"OSV-2021-857","aliases":[],"status":"published","title":"Heap-buffer-overflow in mk_string_copy_substr","description":"OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=35202\n\n```\nCrash type: Heap-buffer-overflow READ {*}\nCrash state:\nmk_string_copy_substr\nmk_rconf_meta_add\nmk_rconf_read\n```","facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"published":"2021-06-14T00:00:34.63836Z","modified":"2026-10-20T17:24:23Z","affected":[{"source":"osv","ecosystem":"OSS-Fuzz","package":"fluent-bit","ranges":[{"type":"GIT","events":[{"introduced":"8f653c34c0dd46c39e2a5ebf9ff3fe9ec932fc4f"},{"introduced":"ed82460da17f5a029df74503d3a5f8f69d29d3ea"},{"fixed":"1c3811ba12bf924a96c916e2409a0d41c336debf"}]}],"versions":["1.8.9-dev-6b56f51","20220215","unstable-1.8","unstable-leonardo-cio-log-poc","v1.8.0","v1.8.0-rc1","v1.8.1","v1.8.10","v1.8.11","v1.8.12","v1.8.13","v1.8.14","v1.8.15","v1.8.2","v1.8.3","v1.8.4","v1.8.5","v1.8.6","v1.8.7","v1.8.8","v1.8.9","v1.8.9-dev-6b56f51","tiger-1.8.15-20221123","tiger-1.8.15-20221220","tiger-1.8.15-20230223","tiger-1.8.15-20230329","tiger-1.8.17","tiger-1.8.16-20230518","tiger-1.8.15-20230518"]}],"references":[{"url":"https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=35202","tags":["report"]}],"sources":{"osv":[{"id":"OSV-2021-857","title":"Heap-buffer-overflow in mk_string_copy_substr","description":"OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=35202\n\n```\nCrash type: Heap-buffer-overflow READ {*}\nCrash state:\nmk_string_copy_substr\nmk_rconf_meta_add\nmk_rconf_read\n```\n","status":"published","published":"2021-06-14T00:00:34.63836Z","modified":"2026-10-20T17:24:23.758517914Z","updated_at":"2026-11-02T15:52:49.275624Z"}]}}