CVE-2025-65493 is a NULL pointer dereference vulnerability in OISM libcoap version 4.3.5, specifically within the src/coap_openssl.c component. This flaw allows remote attackers to trigger a denial of service by crafting a malicious DTLS/TLS connection that causes BIO_get_data() to return a NULL value. The vulnerability carries a CVSS score of 7.5 (HIGH), indicating a significant risk. It is remotely exploitable with low attack complexity and requires no user interaction or privileges, leading directly to a high availability impact. Currently, there is no evidence of active exploitation, nor are there any public exploit modules available in Metasploit, Nuclei, or ExploitDB. The vulnerability has received minimal community discussion and media coverage, suggesting a low level of public awareness or immediate concern.
| 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
The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.
No media coverage found for this CVE.
The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.