{"id":"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.","aliases":["GHSA-97wc-2hqc-cjgr"],"modified":"2026-08-12T03:51:41.569377367Z","published":"2026-05-26T21:38:13.753Z","database_specific":{"cwe_ids":["CWE-122","CWE-190"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/44xxx/CVE-2026-44983.json","cna_assigner":"GitHub_M"},"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"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/servo/smallbitvec","events":[{"introduced":"846aa866a0951bf000c8b3b821bb25472f913a90"},{"fixed":"ad9b17eace931eb8190fa25f7775932ed48d370f"}],"database_specific":{"source":"AFFECTED_FIELD","extracted_events":[{"introduced":"1.0.1"},{"fixed":"2.6.1"}]}}],"versions":["v2.5.3","v2.5.2","v2.5.1","v2.5.0","v2.4.0","v2.3.0","v2.2.0","v2.1.1","v2.1.0","v2.0.0","v1.0.7","v1.0.6","v1.0.5","v1.0.4","v1.0.3","v1.0.2","v1.0.1"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-44983.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H"}]}