{"cve":"CVE-2021-45707","nvd":{"published":"2021-12-27T00:15:09.940","modified":"2026-06-17T04:13:59.380","status":"Modified","description":"An issue was discovered in the nix crate 0.16.0 and later before 0.20.2, 0.21.x before 0.21.2, and 0.22.x before 0.22.2 for Rust. unistd::getgrouplist has an out-of-bounds write if a user is in more than 16 /etc/groups groups.","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://github.com/advisories/GHSA-wgrg-5h56-jg27","https://raw.githubusercontent.com/rustsec/advisory-db/main/crates/nix/RUSTSEC-2021-0119.md","https://rustsec.org/advisories/RUSTSEC-2021-0119.html","https://github.com/advisories/GHSA-wgrg-5h56-jg27","https://raw.githubusercontent.com/rustsec/advisory-db/main/crates/nix/RUSTSEC-2021-0119.md"],"products":["nix_project:nix"],"source":"nvd","synced_at":"2026-10-19T21:26:33.761856376+00:00"},"epss":{"cve":"CVE-2021-45707","score":0.0169,"percentile":0.7707,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-76w9-p8mg-j927","url":"https://osv.dev/vulnerability/GHSA-76w9-p8mg-j927","summary":"Out-of-bounds Write in nix","modified":"2026-09-10T03:49:10.620100151Z","packages":[{"ecosystem":"crates.io","name":"nix","purl":"pkg:cargo/nix","ranges":[">=0.16.0 <0.20.2"],"fixed":["0.20.2"]},{"ecosystem":"crates.io","name":"nix","purl":"pkg:cargo/nix","ranges":[">=0.21.0 <0.21.2"],"fixed":["0.21.2"]},{"ecosystem":"crates.io","name":"nix","purl":"pkg:cargo/nix","ranges":[">=0.22.0 <0.22.2"],"fixed":["0.22.2"]}]},{"id":"GHSA-wgrg-5h56-jg27","url":"https://osv.dev/vulnerability/GHSA-wgrg-5h56-jg27","summary":"Out-of-bounds write in nix::unistd::getgrouplist","modified":"2026-09-10T03:49:44.230755296Z","packages":[{"ecosystem":"crates.io","name":"nix","purl":"pkg:cargo/nix","ranges":[">=0.16.0 <0.20.2"],"fixed":["0.20.2"]},{"ecosystem":"crates.io","name":"nix","purl":"pkg:cargo/nix","ranges":[">=0.21.0 <0.21.2"],"fixed":["0.21.2"]},{"ecosystem":"crates.io","name":"nix","purl":"pkg:cargo/nix","ranges":[">=0.22.0 <0.22.2"],"fixed":["0.22.2"]}]},{"id":"RUSTSEC-2021-0119","url":"https://osv.dev/vulnerability/RUSTSEC-2021-0119","summary":"Out-of-bounds write in nix::unistd::getgrouplist","modified":"2023-11-08T04:07:23.055467Z","packages":[{"ecosystem":"crates.io","name":"nix","purl":"pkg:cargo/nix","ranges":[">=0.16.0 <0.20.2",">=0.21.0-0 <0.21.2",">=0.22.0-0 <0.22.2",">=0.23.0-0 <0.23.0"],"fixed":["0.20.2","0.21.2","0.22.2","0.23.0"]}]}],"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."]}