CVSS 3.1
7.5 highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HCVE-2021-45699
High (7.5) in nervos ckb. EPSS 1.5% chance of exploitation in the next 30 days. Fixed in ckb 0.40.0.
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.
Severity
- EPSS
- 1.5% chance of exploitation in the next 30 days; higher than 74% of CVEs (scores of 2026-10-31)
- CWE
- CWE-770
- Published
- Modified
- Record from
- the NVD, synced
Affected
- nervos:ckb
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-2969-8hh9-57jc | crates.io | ckb | <0.40.0 | 0.40.0 |
| GHSA-48vq-8jqv-gm6f | crates.io | ckb | <0.40.0 | 0.40.0 |
| RUSTSEC-2021-0108 | crates.io | ckb | >=0.0.0-0 <0.40.0 | 0.40.0 |