CVE-2026-12246

HIGH

NLnet Labs NSD < 4.14.3 - APL RR Stack Buffer Overflow

Title source: manual

Description

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.

References (1)

Core 1

Core References

Vendor Advisory vendor-advisory

https://www.nlnetlabs.nl/downloads/nsd/CVE-2026-12246.txt

Scores

CVSS v3 8.1

EPSS 0.0030

EPSS Percentile 22.3%

Attack Vector NETWORK

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H

CISA SSVC

Vulnrichment

Exploitation none

Automatable no

Technical Impact partial

Details

CWE

CWE-120 CWE-20

Status published

Products (2)

NLnet Labs/NSD 4.14.0 - 4.14.3

nlnetlabs/nsd 4.14.0 - 4.14.3

Published Jun 25, 2026

Tracked Since Jun 25, 2026