VDB
CVE-2025-65500
CVE-2025-65500
PUBLISHED
CVSS 4.300000190734863 MEDIUM
NULL pointer dereference in coap_dtls_generate_cookie() 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_SSL_CTX() to return NULL.
EPSS 0.28% · 20.9th percentile
Risk Scores
CVSS 3.1
4.300000190734863
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L
EPSS Score
0.28%
20.9th percentile
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| n/a | n/a | n/a |
| libcoap | libcoap | 4.3.5 |
Timeline
- Nov 24, 2025 CVE Published
- Nov 24, 2025 CVE Updated
- Nov 25, 2025 EPSS Score
- Nov 30, 2025 EPSS Score
- Dec 6, 2025 EPSS Score
- Dec 11, 2025 EPSS Score
- Dec 16, 2025 EPSS Score
- Dec 22, 2025 EPSS Score
- Dec 27, 2025 EPSS Score
- Jan 1, 2026 EPSS Score
- Jan 7, 2026 EPSS Score
- Jan 12, 2026 EPSS Score