Tokens of text in RDATA (of for example TXT records) under 32 bytes are not checked to stay within the space reserved for the RDATA allowing for arbitrary sized out of bound stack writes, including an overwrite of a callback function pointer which is called directly after parse. Zone files which are written out by NSD itself, such for zones for which the NSD instance is secondary, will not be formatted like this. The zone file must be fed to NSD directly, (but it could come, for example, from an operator controlled provisioning system).
Advisories

No advisories yet.

Fixes

Solution

This issue is fixed in 4.15.3 and all later versions.


Workaround

No workaround given by the vendor.

History

Wed, 14 Oct 2026 11:00:00 +0000

Type Values Removed Values Added
Description Tokens of text in RDATA (of for example TXT records) under 32 bytes are not checked to stay within the space reserved for the RDATA allowing for arbitrary sized out of bound stack writes, including an overwrite of a callback function pointer which is called directly after parse. Zone files which are written out by NSD itself, such for zones for which the NSD instance is secondary, will not be formatted like this. The zone file must be fed to NSD directly, (but it could come, for example, from an operator controlled provisioning system).
Title Stack overwrite from specially formatted TXT-DATA RDATA field
Weaknesses CWE-121
References
Metrics cvssV4_0

{'score': 8.7, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: NLnet Labs

Published:

Updated: 2026-10-14T14:08:20.283Z

Reserved: 2026-09-28T14:39:03.779Z

Link: CVE-2026-101341

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-10-14T11:16:57.423

Modified: 2026-10-14T14:17:30.043

Link: CVE-2026-101341

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-10-14T14:00:17Z

Weaknesses