{"cve":"CVE-2020-35859","nvd":{"published":"2020-12-31T10:15:14.877","modified":"2026-06-17T03:14:28.770","status":"Modified","description":"An issue was discovered in the lucet-runtime-internals crate before 0.5.1 for Rust. It mishandles sigstack allocation. Guest programs may be able to obtain sensitive information, or guest programs can experience memory corruption.","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:N/A:H","score":9.1},"cwes":["CWE-125","CWE-787"],"references":["https://rustsec.org/advisories/RUSTSEC-2020-0004.html","https://rustsec.org/advisories/RUSTSEC-2020-0004.html"],"products":["lucet-runtime-internals_project:lucet-runtime-internals"],"source":"nvd","synced_at":"2026-10-19T21:12:09.559580076+00:00"},"epss":{"cve":"CVE-2020-35859","score":0.01523,"percentile":0.74638,"date":"2026-11-01"},"kev":null,"osv":[{"id":"GHSA-3933-wvjf-pcvc","url":"https://osv.dev/vulnerability/GHSA-3933-wvjf-pcvc","summary":"Out of bounds access in lucet-runtime-internals","modified":"2023-11-08T04:03:35.973145Z","packages":[{"ecosystem":"crates.io","name":"lucet-runtime-internals","purl":"pkg:cargo/lucet-runtime-internals","ranges":["<0.4.3"],"fixed":["0.4.3"]},{"ecosystem":"crates.io","name":"lucet-runtime-internals","purl":"pkg:cargo/lucet-runtime-internals","ranges":[">=0.5.0 <0.5.1"],"fixed":["0.5.1"]}]},{"id":"RUSTSEC-2020-0004","url":"https://osv.dev/vulnerability/RUSTSEC-2020-0004","summary":"sigstack allocation bug can cause memory corruption or leak","modified":"2023-11-08T04:03:35.973145Z","packages":[{"ecosystem":"crates.io","name":"lucet-runtime-internals","purl":"pkg:cargo/lucet-runtime-internals","ranges":[">=0.0.0-0 <0.4.3",">=0.5.0 <0.5.1"],"fixed":["0.4.3","0.5.1"]}]}],"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."]}