CVE-2021-45700
Process crashes when the cell used as DepGroup is not alive
An issue was discovered in the ckb crate before 0.40.0 for Rust. Attackers can cause a denial of service (Nervos CKB blockchain node crash) via a dead call that is used as a DepGroup.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- None
- Integrity
- None
- Availability
- High
Exploit likelihood
What each source reports
NVD Score used
An issue was discovered in the ckb crate before 0.40.0 for Rust. Attackers can cause a denial of service (Nervos CKB blockchain node crash) via a dead call that is used as a DepGroup.
- Record
CVE-2021-45700- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - CVSS 2.0
- 7.8 High
AV:N/AC:L/Au:N/C:N/I:N/A:C - Updated
- 2026-11-02
CVE List No score
An issue was discovered in the ckb crate before 0.40.0 for Rust. Attackers can cause a denial of service (Nervos CKB blockchain node crash) via a dead call that is used as a DepGroup.
- Record
CVE-2021-45700- Updated
- 2026-11-02
EUVDEUVD-2022-0568 No score
An issue was discovered in the ckb crate before 0.40.0 for Rust. Attackers can cause a denial of service (Nervos CKB blockchain node crash) via a dead call that is used as a DepGroup.
- Record
EUVD-2022-0568- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-cw98-cx2m-9qqg
Denial of Service in ckb
An issue was discovered in the ckb crate before 0.40.0 for Rust. Attackers can cause a denial of service (Nervos CKB blockchain node crash) via a dead call that is used as a DepGroup.
- Record
GHSA-cw98-cx2m-9qqg- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Weakness
- CWE-400
- Updated
- 2026-11-02
GitHub AdvisoriesGHSA-45p7-c959-rgcm No score
Process crashes when the cell used as DepGroup is not alive
Impact
It's easy to create a malign transaction which uses the dead cell as the DepGroup in the DepCells. The transaction can crash all the receiving nodes.
- Record
GHSA-45p7-c959-rgcm- Updated
- 2026-11-02
OSVGHSA-cw98-cx2m-9qqg
Denial of Service in ckb
An issue was discovered in the ckb crate before 0.40.0 for Rust. Attackers can cause a denial of service (Nervos CKB blockchain node crash) via a dead call that is used as a DepGroup.
- Record
GHSA-cw98-cx2m-9qqg- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Weakness
- CWE-400
- Updated
- 2026-11-02
OSVGHSA-45p7-c959-rgcm No score
Process crashes when the cell used as DepGroup is not alive
Impact
It's easy to create a malign transaction which uses the dead cell as the DepGroup in the DepCells. The transaction can crash all the receiving nodes.
- Record
GHSA-45p7-c959-rgcm- Updated
- 2026-11-02
OSVRUSTSEC-2021-0109 No score
Process crashes when the cell used as DepGroup is not alive
It's easy to create a malign transaction which uses the dead cell as the DepGroup in the DepCells. The transaction can crash all the receiving nodes.
- Record
RUSTSEC-2021-0109- Updated
- 2026-11-02
Affected products
Affected packages
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2021-45700 is a high vulnerability (CVSS 7.5) in Nervos Ckb, published July 25, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.12%, the 66th percentile. Fixed in ckb 0.40.0.
References
rustsec.org/advisories/RUSTSEC-2021-0109.html
raw.githubusercontent.com/rustsec/advisory-db/main/crates/ckb/RUSTSEC-2021-0109.md
github.com/nervosnetwork/ckb/security/advisories/GHSA-45p7-c959-rgcm
nvd.nist.gov/vuln/detail/CVE-2021-45700
crates.io/crates/ckb