CVE-2025-65499

Published Nov 24, 2025 CVSS 3.1 · 4.3 Medium EPSS < 1% KEV · Not listed
Description
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

Sign in to view the affected projects.

Advisories

No advisories available
History
Type Values Removed Values Added
CPEs cpe:2.3:a:libcoap:libcoap:4.3.5:*:*:*:*:*:*:*
Type Values Removed Values Added
First Time appeared Libcoap
Libcoap libcoap
Vendors & Products Libcoap
Libcoap libcoap
Type Values Removed Values Added
Weaknesses CWE-129
Metrics cvssV3_1

{'score': 4.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L'}

ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
Description 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.
References
Weaknesses

Sources

Status
PUBLISHED
Assigner
mitre
Published
Updated
Nov 24, 2025, 6:27 PM
Reserved
Nov 18, 2025, 12:00 AM
Status
Analyzed
Published
Nov 24, 2025, 2:15 PM
Modified
Nov 5, 2026, 1:10 PM