CVE-2021-45699

Published: Dec 27, 2021Modified: Jun 17, 2026

7.5

Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Exploitability: 3.9 / Impact: 3.6

Source: NVD

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.

Affected (1)

Products: Nervos: Ckb

Nervos

1 product

Ckb

Configuration A

1 vulnerable

Vulnerable Software	Affected Versions
Nervos Ckb	Before 0.40.0

Related CWEs

CWE-770

Allocation of Resources Without Limits or Throttling

The product allocates a reusable resource or group of resources on behalf of an actor without imposing any restrictions on the size or number of resources that can be allocated, in violation of the intended security policy for that actor.

References (4)

https://raw.githubusercontent.com/rustsec/advisory-db/main/crates/ckb/RUSTSEC-2021-0108.md

Source: cve@mitre.org

Third Party Advisory

https://rustsec.org/advisories/RUSTSEC-2021-0108.html

Source: cve@mitre.org

Third Party Advisory

https://raw.githubusercontent.com/rustsec/advisory-db/main/crates/ckb/RUSTSEC-2021-0108.md

Source: af854a3a-2127-422b-91ae-364da2661108

Third Party Advisory

https://rustsec.org/advisories/RUSTSEC-2021-0108.html

Source: af854a3a-2127-422b-91ae-364da2661108

Third Party Advisory

Timeline

No history available yet.