How severe is CVE-2023-51847?

CVE-2023-51847 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2023-51847 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (42nd percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2023-51847?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2023-51847 have an EU (EUVD) identifier?

Yes. CVE-2023-51847 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2023-56527.

When was CVE-2023-51847 published?

CVE-2023-51847 was published on 2024-06-06 and last updated on 2026-06-17.

CVE-2023-51847

CVE-2023-51847 is a high-severity vulnerability with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-400.

Key facts

Severity: High (CVSS 3.x base score 7.5)
EPSS exploit prediction: 1% (42nd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2023-56527
Weakness: CWE-400
Published: 2024-06-06
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is 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.
How severe is CVE-2023-51847?: CVE-2023-51847 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2023-51847 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (42nd percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2023-51847?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2023-51847 have an EU (EUVD) identifier?: Yes. CVE-2023-51847 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2023-56527.
When was CVE-2023-51847 published?: CVE-2023-51847 was published on 2024-06-06 and last updated on 2026-06-17.

References

https://github.com/obgm/libcoap/issues/1302

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