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.
Exact source revision recorded 24 Oct 2026 19:17:37 UTC. It does not establish the source's current position. Latest evidence.
nvd · CVE-2021-45699
PublishedAn 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.
NVD analysis and CPE criteria are source context, not proof that a package or your environment is affected. Complete affected data, logical configurations and SSVC are retained in the original JSON.
Source analysis status: Modified
Weakness classifications: CWE-770
Original publisher date fields
published: 2021-12-27T00:15:09.623
lastModified: 2026-06-17T04:13:58.337
1 source CPE criteria · context only
- cpe:2.3:a:nervos:ckb:*:*:*:*:*:rust:*:*
The original JSON retains the logical configuration operators, exclusions and version bounds.
- Source published
- 27 Dec 2021 00:15:09 UTC
- Source modified
- 17 Jun 2026 04:13:58 UTC
- Observed here
- 24 Oct 2026 19:17:37 UTC
- Source terms
- NIST NVD usage terms; underlying source attribution retained
Original source record · Cite this exact observation · Complete original publisher JSON
This view projects the publisher's source fields for reading; the original JSON retains additional fields and CVE enrichment containers. Attribution: nvd · NIST NVD usage terms; underlying source attribution retained. Source text is retained; field grouping and change labels are provided by ChangeIntel.
CVSS 3.1 · [email protected] · Primary · 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS 2.0 · [email protected] · Primary · 7.8 AV:N/AC:L/Au:N/C:N/I:N/A:C