CVE-2025-65493

HIGH EPSS 24.8%
Published Nov 24, 20257mo ago · Modified Jun 17, 20261w ago
7.5 CVSS 3.1
High
Find Similar
Published Nov 24, 2025 7mo ago
Last Modified Jun 17, 2026 1w ago

Description

NULL pointer dereference in src/coap_openssl.c in OISM libcoap 4.3.5 allows remote attackers to cause a denial of service via a crafted DTLS/TLS connection that triggers BIO_get_data() to return NULL.

CVSS Details

Base Score
7.5
Exploitability
3.9
Impact
3.6
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability High

Threat Intelligence

EPSS Exploit Probability
24.8% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-476 NULL Pointer Dereference Memory Safety

Affected Products 1

VendorProductVersionRange
libcoaplibcoap4.3.5any

References 2

  • github.com https://github.com/obgm/libcoap/issues/1743
    Issue Tracking
  • github.com https://github.com/obgm/libcoap/pull/1750
    Issue TrackingPatch

Remediation

  • github.com https://github.com/obgm/libcoap/pull/1750
    Issue TrackingPatch