{"cve":"CVE-2021-25900","nvd":{"published":"2021-01-26T18:16:22.270","modified":"2026-06-17T03:42:32.730","status":"Modified","description":"An issue was discovered in the smallvec crate before 0.6.14 and 1.x before 1.6.1 for Rust. There is a heap-based buffer overflow in SmallVec::insert_many.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","score":9.8},"cwes":["CWE-787"],"references":["https://rustsec.org/advisories/RUSTSEC-2021-0003.html","https://rustsec.org/advisories/RUSTSEC-2021-0003.html"],"products":["servo:smallvec"],"source":"nvd","synced_at":"2026-10-19T21:14:10.479542811+00:00"},"epss":{"cve":"CVE-2021-25900","score":0.0172,"percentile":0.77469,"date":"2026-11-01"},"kev":null,"osv":[{"id":"GHSA-43w2-9j62-hq99","url":"https://osv.dev/vulnerability/GHSA-43w2-9j62-hq99","summary":"Buffer overflow in SmallVec::insert_many","modified":"2023-11-08T04:05:16.493284Z","packages":[{"ecosystem":"crates.io","name":"smallvec","purl":"pkg:cargo/smallvec","ranges":[">=0.6.3 <0.6.14"],"fixed":["0.6.14"]},{"ecosystem":"crates.io","name":"smallvec","purl":"pkg:cargo/smallvec","ranges":[">=1.0.0 <1.6.1"],"fixed":["1.6.1"]}]},{"id":"RUSTSEC-2021-0003","url":"https://osv.dev/vulnerability/RUSTSEC-2021-0003","summary":"Buffer overflow in SmallVec::insert_many","modified":"2026-07-17T16:00:03.208176448Z","packages":[{"ecosystem":"crates.io","name":"smallvec","purl":"pkg:cargo/smallvec","ranges":[">=0.6.3 <0.6.14",">=1.0.0 <1.6.1"],"fixed":["0.6.14","1.6.1"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}