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VULNERABILITIES

CVE-2026-12245 Details

Description

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.

Metrics

CVSS 3.x Severity and Vector Strings:

NIST: [email protected]CVSS-B:7.5 HIGHVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References to Advisories, Solutions, and Tools

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URLSource(s)Tag(s)
https://www.nlnetlabs.nl/downloads/nsd/CVE-2026-12245.txt [email protected]PatchVendor Advisory

Weakness Enumeration

CWE-IDCWE NameSource
CWE-416Use After Free[email protected]

Affected Products

ProductVersions
nlnetlabs nsd
>= 4.13.0, < 4.14.3

CPE

  • cpe:2.3:a:nlnetlabs:nsd:*:*:*:*:*:*:*:*

Remediation

  • No remediation found in references.

Change History

3 change records found show changes

QUICK INFO

CVE Dictionary Entry:
CVE-2026-12245
NVD Published Date:
Jun 25, 2026
NVD Last Modified:
Jun 26, 2026
Source:
[email protected]
CVE-2026-12245 Details - Not Deferred