Vulnerability Details CVE-2025-65495
Integer signedness error in tls_verify_call_back() in src/coap_openssl.c in OISM libcoap 4.3.5 allows remote attackers to cause a denial of service via a crafted TLS certificate that causes i2d_X509() to return -1 and be misused as a malloc() size parameter.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.001
EPSS Ranking 24.0%
CVSS Severity
CVSS v3 Score 7.5