CVE-2025-65501 — MEDIUM (4.3)

Vulnerability Description

Null pointer dereference in coap_dtls_info_callback() in OISM libcoap 4.3.5 allows remote attackers to cause a denial of service via a DTLS handshake where SSL_get_app_data() returns NULL.

CVSS Score

4.3

MEDIUM

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

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality

NONE

Integrity

NONE

Availability

LOW

Affected Products

Vendor	Product	Versions
Libcoap	Libcoap	4.3.5

Related Weaknesses (CWE)

CWE-476

References

https://github.com/obgm/libcoap/issues/1748Issue Tracking
https://github.com/obgm/libcoap/pull/1750Issue Tracking

FAQ

What is CVE-2025-65501?

CVE-2025-65501 is a vulnerability with a CVSS score of 4.3 (MEDIUM). Null pointer dereference in coap_dtls_info_callback() in OISM libcoap 4.3.5 allows remote attackers to cause a denial of service via a DTLS handshake where SSL_get_app_data() returns NULL.

How severe is CVE-2025-65501?

CVE-2025-65501 has been rated MEDIUM with a CVSS base score of 4.3/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2025-65501?

Check the references section above for vendor advisories and patch information. Affected products include: Libcoap Libcoap.