{"id":"OSV-2020-1851","aliases":[],"status":"published","title":"Stack-buffer-underflow in fmt::v6::basic_format_args\u003cfmt::v6::basic_format_context\u003cstd::__1::back_insert_i","description":"OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=21794\n\n```\nCrash type: Stack-buffer-underflow READ 16\nCrash state:\nfmt::v6::basic_format_args\u003cfmt::v6::basic_format_context\u003cstd::__1::back_insert_i\nfmt::v6::basic_format_args\u003cfmt::v6::basic_format_context\u003cstd::__1::back_insert_i\nfmt::v6::basic_format_context\u003cstd::__1::back_insert_iterator\u003cfmt::v6::internal::\n```","facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"published":"2020-09-26T00:00:34.36887Z","modified":"2022-04-13T03:04:41Z","affected":[{"source":"osv","ecosystem":"OSS-Fuzz","package":"libfmt","ranges":[{"type":"GIT","events":[{"introduced":"8a4630686e2dd24900897298c4ae1362de749ed8"},{"fixed":"3f79357ef0291f2c053d5a69842a72a4ec47124e"}]}]}],"references":[{"url":"https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=21794","tags":["report"]}],"sources":{"osv":[{"id":"OSV-2020-1851","title":"Stack-buffer-underflow in fmt::v6::basic_format_args\u003cfmt::v6::basic_format_context\u003cstd::__1::back_insert_i","description":"OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=21794\n\n```\nCrash type: Stack-buffer-underflow READ 16\nCrash state:\nfmt::v6::basic_format_args\u003cfmt::v6::basic_format_context\u003cstd::__1::back_insert_i\nfmt::v6::basic_format_args\u003cfmt::v6::basic_format_context\u003cstd::__1::back_insert_i\nfmt::v6::basic_format_context\u003cstd::__1::back_insert_iterator\u003cfmt::v6::internal::\n```\n","status":"published","published":"2020-09-26T00:00:34.36887Z","modified":"2022-04-13T03:04:41.476667Z","updated_at":"2026-11-02T15:52:48.531106Z"}]}}