Vulnerability Details CVE-2025-65500
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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.001
EPSS Ranking 32.9%
CVSS Severity
CVSS v3 Score 4.3