{"id":"CVE-2021-29939","aliases":["GHSA-9frf-r7c7-j2vg","RUSTSEC-2021-0048"],"url":"https://o3.security/vulnerability/CVE-2021-29939","summary":"Out of bounds write in stackvector","details":"An issue was discovered in the stackvector crate through 2021-02-19 for Rust. There is an out-of-bounds write in StackVec::extend if size_hint provides certain anomalous data.","published":"2021-04-01T05:15:14.843Z","modified":"2026-03-14T10:57:19.198142Z","cvss":{"score":7.3,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L"},"epss":null,"cisaKev":null,"exploitsKnown":1,"affectedPackages":[{"ecosystem":"crates.io","name":"stackvector","fixedVersion":"1.0.9"}],"fix":null,"references":[{"type":"EVIDENCE","url":"https://rustsec.org/advisories/RUSTSEC-2021-0048.html"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-03-14T10:57:19.198142Z"}}