CVE-2025-65494 is a NULL pointer dereference vulnerability in the get_san_or_cn_from_cert() function within OISM libcoap 4.3.5. This flaw allows remote attackers to trigger a denial of service by providing a specially crafted X.509 certificate that causes a NULL return from sk_GENERAL_NAME_value(). Rated 7.5 HIGH on the CVSS scale, it presents a low-complexity attack requiring no user interaction or privileges, with the primary impact being system availability. Currently, there is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion surrounding this CVE.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
4.3.5CPE matchmatch criteria | cpe:2.3:a:libcoap:libcoap:4.3.5:-:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
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