CVE-2023-51847
An issue in obgm and Libcoap v.a3ed466 allows a remote attacker to cause a denial of service via...
An issue in obgm and Libcoap v.a3ed466 allows a remote attacker to cause a denial of service via thecoap_context_t function in the src/coap_threadsafe.c:297:3 component.
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
CVE List Score used
An issue in obgm and Libcoap v.a3ed466 allows a remote attacker to cause a denial of service via thecoap_context_t function in the src/coap_threadsafe.c:297:3 component.
- Record
CVE-2023-51847- 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
EUVDEUVD-2023-56527
An issue in obgm and Libcoap v.a3ed466 allows a remote attacker to cause a denial of service via thecoap_context_t function in the src/coap_threadsafe.c:297:3 component.
- Record
EUVD-2023-56527- 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 - Updated
- 2026-11-03
GitHub AdvisoriesGHSA-hmc2-hhww-hmr3
An issue in obgm and Libcoap v.a3ed466 allows a remote attacker to cause a denial of service via...
An issue in obgm and Libcoap v.a3ed466 allows a remote attacker to cause a denial of service via thecoap_context_t function in the src/coap_threadsafe.c:297:3 component.
- Record
GHSA-hmc2-hhww-hmr3- 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
NVD
An issue in obgm and Libcoap v.a3ed466 allows a remote attacker to cause a denial of service via thecoap_context_t function in the src/coap_threadsafe.c:297:3 component.
- Record
CVE-2023-51847- 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
OSVUBUNTU-CVE-2023-51847
An issue in obgm and Libcoap v.a3ed466 allows a remote attacker to cause a denial of service via thecoap_context_t function in the src/coap_threadsafe.c:297:3 component.
- Record
UBUNTU-CVE-2023-51847- 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 - Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
libcoapUbuntu:18.04:LTS |
All versions, plus listed versions 4.1.2-1 |
None known |
libcoap2Ubuntu:20.04:LTS |
All versions, plus listed versions 4.2.0-24.2.1-1 |
None known |
libcoap2Ubuntu:22.04:LTS |
All versions, plus listed versions 4.2.1-14.2.1-1build1 |
None known |
libcoap3Ubuntu:22.04:LTS |
All versions, plus listed versions 4.3.0-24.3.0-2build1 |
None known |
libcoap3Ubuntu:24.04:LTS |
All versions, plus listed versions 4.3.1-24.3.3-14.3.4-14.3.4-1.1build24.3.4-1.1build34.3.4-1.1build4 |
None known |
libcoap3Ubuntu:25.10 |
All versions, plus listed versions 4.3.4-1.1build4 |
None known |
libcoap3Ubuntu:26.10 |
All versions, plus listed versions 4.3.5-24.3.5-34.3.5-44.3.5-4ubuntu1 |
None known |
libcoap3Ubuntu:26.04:LTS |
All versions, plus listed versions 4.3.4-1.1build44.3.5-14.3.5-2 |
None known |
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases, published | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2023-51847 is a high vulnerability (CVSS 7.5) in Libcoap, published June 6, 2024. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.56%, the 46th percentile. No source names a fixed version.