CVE-2025-65501

State: Published
Severity: 4.3 Medium
Published: Nov 24, 2025
Updated: Nov 24, 2025
Reserved: Nov 18, 2025

Description

Null pointer dereference in coap_dtls_info_callback() in OISM libcoap 4.3.5 allows remote attackers to cause a denial of service via a DTLS handshake where SSL_get_app_data() returns NULL.

Scores

CVSS	Score	Vector	Source
3.1	4.3 Medium	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L	CISA-ADP

Weaknesses

CWE-476 NULL Pointer Dereference

Affected Products

Product	Versions
n/an/a	n/aAffected

References

https://github.com/obgm/libcoap/issues/1748
https://github.com/obgm/libcoap/pull/1750

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