EUVD-2025-198708

NULL pointer dereference in coapdtlsgeneratecookie in src/coapopenssl.c in OISM libcoap 4.3.5 allows remote attackers to cause a denial of service via a crafted DTLS handshake that triggers SSLgetSSLCTX to return NULL...

PT-2025-47909

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...