CVE-2025-65499 Affecting libcoap3 package, versions *
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- published25 Nov 2025
- disclosed24 Nov 2025
Introduced: 24 Nov 2025
NewCVE-2025-65499 (opens in a new tab)Common Vulnerabilities and Exposures (CVE) are common identifiers for publicly known security vulnerabilities
How to fix?
There is no fixed version for Debian:12 libcoap3.
NVD Description
Note: Versions mentioned in the description apply only to the upstream libcoap3 package and not the libcoap3 package as distributed by Debian.
See How to fix? for Debian:12 relevant fixed versions and status.
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.