{"id":"CVE-2026-44983","aliases":["GHSA-97wc-2hqc-cjgr"],"url":"https://o3.security/vulnerability/CVE-2026-44983","summary":"smallbitvec: Safe API Triggered Heap Buffer Overflow via Integer Overflow","details":"smallbitvec is a growable bit-vector for Rust, optimized for size. From 1.0.1 to 2.6.0, an integer overflow in the internal capacity calculation of smallbitvec can lead to an undersized heap allocation, resulting in a heap buffer overflow through safe APIs only. This allows memory corruption without requiring unsafe code from the caller. This vulnerability is fixed in 2.6.1.","published":"2026-05-26T21:38:13.753Z","modified":"2026-08-07T11:31:29.066161322Z","cvss":{"score":7.3,"severity":"HIGH","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H"},"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"crates.io","name":"smallbitvec","fixedVersion":null}],"fix":null,"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/44xxx/CVE-2026-44983.json"},{"type":"ADVISORY","url":"https://github.com/servo/smallbitvec/security/advisories/GHSA-97wc-2hqc-cjgr"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-44983"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-07T11:31:29.066161322Z"}}