---
cve: "CVE-2026-12245"
severity: "HIGH"
cvss: 8.7
epss: "32%"
vendor: "NLnet Labs"
kev: false
exploited: false
published: "2026-06-25 07:16:45"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-08T16:25:12+02:00"
---

# CVE-2026-12245

> 8.7 HIGH

## Beschreibung

NSD from version 4.13.0 has a heap use-after-free bug in logging errors on TLS connections, causing a crash of the server process, which can be triggered trivially by sending a DNS query over a DoT connection, and closing the connection without reading the response.

## CVSS-Vektor

```
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| AC Komplexität | Gering | bad |
| PR Privilegien | Keine | bad |
| UI Interaktion | Keine | bad |

## Patch verfügbar (OSV)

- fc930b88cb4f628defae9835449065945bda7ddc (Commit)

## Referenzen

- <https://www.nlnetlabs.nl/downloads/nsd/CVE-2026-12245.txt>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-12245) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_