Unrated severityNVD Advisory· Published Nov 24, 2025· Updated Nov 24, 2025
CVE-2025-65499
CVE-2025-65499
Description
Array index 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 DTLS handshake that triggers SSL_get_ex_data_X509_STORE_CTX_idx() to return -1.
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Affected products
3- OISM/libcoapdescription
Patches
Vulnerability mechanics
References
2News mentions
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