{"id":"CVE-2021-45699","revision":"a9a3d593d7544b26a633691865a10bb8","records":[{"revision":"a9a3d593d7544b26a633691865a10bb8","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2021-45699","aliases":[],"title":"An issue was discovered in the ckb crate before 0.40.0 for Rust. Remote attackers may be able to conduct a 51% attack against the Nervos CKB blockchain by triggering an inability to allocate memory for the misbehavior HashMap.","description":"An issue was discovered in the ckb crate before 0.40.0 for Rust. Remote attackers may be able to conduct a 51% attack against the Nervos CKB blockchain by triggering an inability to allocate memory for the misbehavior HashMap.","state":0,"publishedAt":"2021-12-26T21:49:25+00:00","modifiedAt":"2024-08-04T04:47:02.387+00:00","affected":[{"ecosystem":"Vendor product","name":"n/a","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"n/a\",\n                    \"vendor\": \"n/a\",\n                    \"versions\": [\n                        {\n                            \"status\": \"affected\",\n                            \"version\": \"n/a\"\n                        }\n                    ]\n                }"}],"metrics":[],"references":["https://rustsec.org/advisories/RUSTSEC-2021-0108.html","https://raw.githubusercontent.com/rustsec/advisory-db/main/crates/ckb/RUSTSEC-2021-0108.md"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2021-45699","license":"CVE Program Terms of Use","key":"cve-program:CVE-2021-45699","identifiers":["CVE-2021-45699"]},"retained":false,"historicalAffected":[]}],"coverage":[]}