{"id":"CVE-2018-20991","url":"https://www.cyber-defence.io/tools/cve/CVE-2018-20991","generatedAt":"2026-10-28T21:27:22.054Z","title":"An issue was discovered in the smallvec crate before 0.6.3 for Rust.","description":"An issue was discovered in the smallvec crate before 0.6.3 for Rust. The Iterator implementation mishandles destructors, leading to a double free.","published":"2019-08-26T15:15:11.000Z","lastModified":"2026-06-17T01:53:54.000Z","status":"Modified","sourceIdentifier":"cve@mitre.org","cvss":{"version":"3.0","score":9.8,"severity":"CRITICAL","vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"},"cwe":["CWE-415"],"affected":["servo/smallvec"],"epss":{"score":0.01848,"percentile":0.78971,"date":"2026-10-27","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (1.85%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[],"references":[{"url":"https://rustsec.org/advisories/RUSTSEC-2018-0003.html","tags":["Third Party Advisory"],"source":"cve@mitre.org"},{"url":"https://rustsec.org/advisories/RUSTSEC-2018-0003.html","tags":["Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2018-20991","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}