{"id":"GHSA-43w2-9j62-hq99","summary":"Buffer overflow in SmallVec::insert_many","details":"A bug in the SmallVec::insert_many method caused it to allocate a buffer that was smaller than needed. It then wrote past the end of the buffer, causing a buffer overflow and memory corruption on the heap. This bug was only triggered if the iterator passed to insert_many yielded more items than the lower bound returned from its size_hint method.\n\nThe flaw was corrected in smallvec 0.6.14 and 1.6.1, by ensuring that additional space is always reserved for each item inserted. The fix also simplified the implementation of insert_many to use less unsafe code, so it is easier to verify its correctness.","aliases":["CVE-2021-25900","RUSTSEC-2021-0003"],"modified":"2023-11-01T04:54:46.749400Z","published":"2022-05-24T17:40:21Z","database_specific":{"severity":"CRITICAL","github_reviewed":true,"github_reviewed_at":"2022-06-17T00:20:48Z","nvd_published_at":"2021-01-26T18:16:00Z","cwe_ids":["CWE-787"]},"references":[{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2021-25900"},{"type":"WEB","url":"https://github.com/servo/rust-smallvec/issues/252"},{"type":"WEB","url":"https://github.com/servo/rust-smallvec/commit/5757ac500d4e544485d796b542e4e589749c291b"},{"type":"WEB","url":"https://github.com/servo/rust-smallvec/commit/9998ba0694a6b51aa6604748b00b6a98f0a0039e"},{"type":"PACKAGE","url":"https://github.com/servo/rust-smallvec"},{"type":"WEB","url":"https://rustsec.org/advisories/RUSTSEC-2021-0003.html"}],"affected":[{"package":{"name":"smallvec","ecosystem":"crates.io","purl":"pkg:cargo/smallvec"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0.6.3"},{"fixed":"0.6.14"}]}],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2022/05/GHSA-43w2-9j62-hq99/GHSA-43w2-9j62-hq99.json"}},{"package":{"name":"smallvec","ecosystem":"crates.io","purl":"pkg:cargo/smallvec"},"ranges":[{"type":"SEMVER","events":[{"introduced":"1.0.0"},{"fixed":"1.6.1"}]}],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2022/05/GHSA-43w2-9j62-hq99/GHSA-43w2-9j62-hq99.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"}]}