CVE-2026-12246

Out of bounds stack write with crafted APL RR

State: Published
Severity: 7.2 High
Published: Jun 25, 2026
Updated: Jun 25, 2026
Reserved: Jun 15, 2026

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.

Scores

CVSS	Score	Vector	Source
4.0	7.2 High	CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N	NLnet Labs

Weaknesses

CWE-120 Buffer Copy without Checking Size of Input
CWE-20 Improper Input Validation

Affected Products

Product	Versions
NSDNLnet Labs	4.14.0 to before 4.14.3Affected

References

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

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