CVE-2021-43668
Denial of Service in Go-Ethereum
Go-Ethereum 1.10.9 nodes crash (denial of service) after receiving a serial of messages and cannot be recovered. They will crash with "runtime error: invalid memory address or nil pointer dereference" and arise a SEGV signal.
Attack profile
How easy it is to exploit
- Attack vector
- Local
- Complexity
- Low
- Privileges needed
- Low
- User interaction
- None
What an attacker can affect
- Confidentiality
- None
- Integrity
- None
- Availability
- High
Exploit likelihood
What each source reports
NVD Score used
Go-Ethereum 1.10.9 nodes crash (denial of service) after receiving a serial of messages and cannot be recovered. They will crash with "runtime error: invalid memory address or nil pointer dereference" and arise a SEGV signal.
- Record
CVE-2021-43668- CVSS 3.1
- 5.5 Medium
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H - CVSS 2.0
- 2.1 Low
AV:L/AC:L/Au:N/C:N/I:N/A:P - Weakness
- CWE-476
- Updated
- 2026-11-02
CVE List No score
Go-Ethereum 1.10.9 nodes crash (denial of service) after receiving a serial of messages and cannot be recovered. They will crash with "runtime error: invalid memory address or nil pointer dereference" and arise a SEGV signal.
- Record
CVE-2021-43668- Updated
- 2026-11-02
EUVDEUVD-2021-2303 No score
Go-Ethereum 1.10.9 nodes crash (denial of service) after receiving a serial of messages and cannot be recovered. They will crash with "runtime error: invalid memory address or nil pointer dereference" and arise a SEGV signal.
- Record
EUVD-2021-2303- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-5m8f-chrv-7rw5
Denial of Service in Go-Ethereum
Go-Ethereum 1.10.9 nodes crash (denial of service) after receiving a serial of messages and cannot be recovered. They will crash with "runtime error: invalid memory address or nil pointer dereference" and arise a SEGV signal.
- Record
GHSA-5m8f-chrv-7rw5- CVSS 3.1
- 5.5 Medium
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H - Weakness
- CWE-476
- Updated
- 2026-11-02
OSV
Go-Ethereum 1.10.9 nodes crash (denial of service) after receiving a serial of messages and cannot be recovered. They will crash with "runtime error: invalid memory address or nil pointer dereference" and arise a SEGV signal.
- Record
CVE-2021-43668- CVSS 3.1
- 5.5 Medium
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
OSVGHSA-5m8f-chrv-7rw5
Denial of Service in Go-Ethereum
Go-Ethereum 1.10.9 nodes crash (denial of service) after receiving a serial of messages and cannot be recovered. They will crash with "runtime error: invalid memory address or nil pointer dereference" and arise a SEGV signal.
- Record
GHSA-5m8f-chrv-7rw5- CVSS 3.1
- 5.5 Medium
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H - Weakness
- CWE-476
- Updated
- 2026-11-02
OSVUBUNTU-CVE-2021-43668
Go-Ethereum 1.10.9 nodes crash (denial of service) after receiving a serial of messages and cannot be recovered. They will crash with "runtime error: invalid memory address or nil pointer dereference" and arise a SEGV signal.
- Record
UBUNTU-CVE-2021-43668- CVSS 3.1
- 5.5 Medium
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
github.com/ethereum/go-ethereumGo |
through 1.10.9 | None known |
golang-goleveldbUbuntu:16.04:LTS |
All versions, plus listed versions 0+git20150214.e9e2c8f-10+git20150819.1a9d62f-1 |
None known |
golang-goleveldbUbuntu:18.04:LTS |
All versions, plus listed versions 0.0~git20170302.0.3c5717c-50.0~git20170725.0.b89cc31-10.0~git20170725.0.b89cc31-2 |
None known |
golang-goleveldbUbuntu:20.04:LTS |
All versions, plus listed versions 0.0~git20170725.0.b89cc31-2 |
None known |
golang-goleveldbUbuntu:22.04:LTS |
All versions, plus listed versions 0.0~git20200815.5c35d60-1 |
None known |
golang-goleveldbUbuntu:24.04:LTS |
All versions, plus listed versions 0.0~git20200815.5c35d60-10.0~git20200815.5c35d60-2 |
None known |
golang-goleveldbUbuntu:25.10 |
All versions, plus listed versions 0.0~git20200815.5c35d60-2 |
None known |
golang-goleveldbUbuntu:26.10 |
All versions, plus listed versions 0.0~git20200815.5c35d60-2 |
None known |
golang-goleveldbUbuntu:26.04:LTS |
All versions, plus listed versions 0.0~git20200815.5c35d60-2 |
None known |
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-2021-43668 is a medium vulnerability (CVSS 5.5) in Ethereum Go Ethereum, published November 18, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.26%, the 17th percentile. No source names a fixed version.