CVE-2025-65499

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2025-65499
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.

4.3 /10

CVSS v3 : MEDIUM

V3 Legend

Vector :

Exploitability : 2.8 / Impact : 1.4

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact LOW

Scope UNCHANGED

References
Link Resource
https://github.com/obgm/libcoap/issues/1747 Issue Tracking
https://github.com/obgm/libcoap/pull/1750 Issue Tracking Patch
Configurations

Configuration 1 (hide)

cpe:2.3:a:libcoap:libcoap:4.3.5:*:*:*:*:*:*:*
History

01 Dec 2025, 16:29

Type Values Removed Values Added
First Time Libcoap
Libcoap libcoap
CPE cpe:2.3:a:libcoap:libcoap:4.3.5:*:*:*:*:*:*:*
References () https://github.com/obgm/libcoap/issues/1747 - () https://github.com/obgm/libcoap/issues/1747 - Issue Tracking
References () https://github.com/obgm/libcoap/pull/1750 - () https://github.com/obgm/libcoap/pull/1750 - Issue Tracking, Patch

24 Nov 2025, 19:15

Type Values Removed Values Added
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 4.3
CWE CWE-129

24 Nov 2025, 14:15

Type Values Removed Values Added
New CVE
Information

Published : 2025-11-24 14:15

Updated : 2025-12-01 16:29

NVD link : CVE-2025-65499

Mitre link : CVE-2025-65499

CVE.ORG link : CVE-2025-65499

JSON object : View

Products Affected

libcoap

  • libcoap
CWE
CWE-129

Improper Validation of Array Index