[SECURITY] Fedora 43 Update: libcoap-4.3.5a-1.fc43

The Constrained Application Protocol CoAP is a specialized web transfer protocol for use with constrained nodes and constrained networks in the Inter net of Things. The protocol is designed for machine-to-machine M2M applications such as smart energy and building automation. libcoap implements a...

DEBIAN-CVE-2025-65500

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...

CVE-2025-65493

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

UBUNTU-CVE-2025-65500

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...

CVE-2025-65495

CVE-2025-65495 affects libcoap 4.3.5. The issue is a signedness error in tls_verify_call_back() inside src/coap_openssl.c that can allow a remote attacker to trigger a denial of service by sending a crafted TLS certificate, causing i2d_X509() to return -1 and be misused as a malloc() size. Public...

CVE-2025-65497

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-2025-47915

Name of the Vulnerable Software and Affected Versions libcoap version 4.3.5 Description A flaw exists in libcoap where a null pointer dereference in the coap dtls info callback function can occur. This happens during a DTLS handshake when SSL get app data returns NULL, potentially leading to a...

CVE-2025-65500

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...

Linux Distros Unpatched Vulnerability : CVE-2025-65499

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - Array index error in tlsverifycallback in src/coapopenssl.c in OISM libcoap 4.3.5 allows remote attackers to cause a denial of service via a crafted DTLS...