Vulnerability DatabaseCVE-2026-12245
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CVE-2026-12245
Published:June 25, 2026
Updated:June 29, 2026
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.
Affected Packages
https://github.com/NLnetLabs/nsd.git (GITHUB):
Affected version(s) >=NSD_4_13_0_REL <NSD_4_14_3_REL
Fix Suggestion:
Update to version NSD_4_14_3_REL
Related Resources (1)
https://www.nlnetlabs.nl/downloads/nsd/CVE-2026-12245.txt
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CVSS v4
Base Score:
8.7
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
NONE
Vulnerable System Integrity
NONE
Vulnerable System Availability
HIGH
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
7.5
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Weakness Type (CWE)
Use After Free
CWE-416
EPSS
Base Score:
0.27