CVE-2026-12246

NSD version 4.14.0 introduced a bug where a specially crafted APL RR, with an adflength larger than permitted for the address family will overwrite the stack when the zone is written to disk, with a maximum of 111 attacker controlled bytes.

CVSS v3 8.1 HIGH

8.1^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.8 / Impact : 5.2

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://www.nlnetlabs.nl/downloads/nsd/CVE-2026-12246.txt	Patch Vendor Advisory

Configurations

Configuration 1 (hide)

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

History

26 Jun 2026, 02:07

Type	Values Removed	Values Added
First Time		Nlnetlabs Nlnetlabs nsd
CPE		cpe:2.3:a:nlnetlabs:nsd::::::::
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : unknown v3 : 8.1
References	~~() https://www.nlnetlabs.nl/downloads/nsd/CVE-2026-12246.txt -~~	() https://www.nlnetlabs.nl/downloads/nsd/CVE-2026-12246.txt - Patch, Vendor Advisory

25 Jun 2026, 07:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-06-25 07:16

Updated : 2026-06-26 02:07

NVD link : CVE-2026-12246

Mitre link : CVE-2026-12246

CVE.ORG link : CVE-2026-12246

JSON object : View

Products Affected

nlnetlabs

nsd

CWE

CWE-20

Improper Input Validation

CWE-120

Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')

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