VDB
CVE-2025-65495
CVE-2025-65495
PUBLISHED
CVSS 7.5 HIGH
Integer signedness 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 TLS certificate that causes i2d_X509() to return -1 and be misused as a malloc() size parameter.
EPSS 0.24% · 15.1th percentile
Risk Scores
CVSS 3.1
7.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS Score
0.24%
15.1th percentile
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| libcoap | libcoap | 4.3.5 |
| n/a | n/a | n/a |
Timeline
- Nov 24, 2025 CVE Published
- Nov 24, 2025 CVE Updated
- Nov 25, 2025 EPSS Score
- Nov 30, 2025 EPSS Score
- Dec 5, 2025 EPSS Score
- Dec 9, 2025 EPSS Score
- Dec 14, 2025 EPSS Score
- Dec 19, 2025 EPSS Score
- Dec 24, 2025 EPSS Score
- Dec 29, 2025 EPSS Score
- Jan 2, 2026 EPSS Score
- Jan 7, 2026 EPSS Score