{"cve":"CVE-2021-45696","nvd":{"published":"2021-12-27T00:15:09.503","modified":"2026-06-17T04:13:57.980","status":"Modified","description":"An issue was discovered in the sha2 crate 0.9.7 before 0.9.8 for Rust. Hashes of long messages may be incorrect when the AVX2-accelerated backend is used.","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-327"],"references":["https://raw.githubusercontent.com/rustsec/advisory-db/main/crates/sha2/RUSTSEC-2021-0100.md","https://rustsec.org/advisories/RUSTSEC-2021-0100.html","https://raw.githubusercontent.com/rustsec/advisory-db/main/crates/sha2/RUSTSEC-2021-0100.md","https://rustsec.org/advisories/RUSTSEC-2021-0100.html"],"products":["sha2_project:sha2"],"source":"nvd","synced_at":"2026-10-19T21:26:33.761856376+00:00"},"epss":{"cve":"CVE-2021-45696","score":0.00831,"percentile":0.57607,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-fc7x-2cmc-8j2g","url":"https://osv.dev/vulnerability/GHSA-fc7x-2cmc-8j2g","summary":"Incorrect hash in sha2","modified":"2023-11-08T04:07:22.441009Z","packages":[{"ecosystem":"crates.io","name":"sha2","purl":"pkg:cargo/sha2","ranges":[">=0.9.7 <0.9.8"],"fixed":["0.9.8"]}]},{"id":"GHSA-xpww-g9jx-hp8r","url":"https://osv.dev/vulnerability/GHSA-xpww-g9jx-hp8r","summary":"Miscomputed sha2 results when using AVX2 backend","modified":"2023-11-08T04:07:22.441009Z","packages":[{"ecosystem":"crates.io","name":"sha2","purl":"pkg:cargo/sha2","ranges":[">=0.9.7 <0.9.8"],"fixed":["0.9.8"]}]},{"id":"RUSTSEC-2021-0100","url":"https://osv.dev/vulnerability/RUSTSEC-2021-0100","summary":"Miscomputed results when using AVX2 backend","modified":"2023-11-08T04:07:22.441009Z","packages":[{"ecosystem":"crates.io","name":"sha2","purl":"pkg:cargo/sha2","ranges":[">=0.9.7 <0.9.8"],"fixed":["0.9.8"]}]}],"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."]}