CVE-2025-65498

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2025-65498
NULL pointer dereference in coap_dtls_generate_cookie() in src/coap_openssl.c in OISM libcoap 4.3.5 allows remote attackers to cause a denial of service via a crafted DTLS handshake that triggers SSL_get_SSL_CTX() to return NULL.

4.3 /10

CVSS v3 : MEDIUM

V3 Legend

Vector :

Exploitability : 2.8 / Impact : 1.4

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact LOW

Scope UNCHANGED

References
Link Resource
https://github.com/obgm/libcoap/issues/1746 Issue Tracking
https://github.com/obgm/libcoap/pull/1750 Issue Tracking Patch
Configurations

Configuration 1 (hide)

cpe:2.3:a:libcoap:libcoap:4.3.5:-:*:*:*:*:*:*
History

01 Dec 2025, 16:31

Type Values Removed Values Added
References () https://github.com/obgm/libcoap/issues/1746 - () https://github.com/obgm/libcoap/issues/1746 - Issue Tracking
References () https://github.com/obgm/libcoap/pull/1750 - () https://github.com/obgm/libcoap/pull/1750 - Issue Tracking, Patch
CPE cpe:2.3:a:libcoap:libcoap:4.3.5:-:*:*:*:*:*:*
First Time Libcoap libcoap
Libcoap

24 Nov 2025, 19:15

Type Values Removed Values Added
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 4.3
CWE CWE-476

24 Nov 2025, 14:15

Type Values Removed Values Added
New CVE
Information

Published : 2025-11-24 14:15

Updated : 2025-12-01 16:31

NVD link : CVE-2025-65498

Mitre link : CVE-2025-65498

CVE.ORG link : CVE-2025-65498

JSON object : View

Products Affected

libcoap

  • libcoap
CWE
CWE-476

NULL Pointer Dereference