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High

Stack overwrite from specially formatted TXT-DATA RDATA field

Type: advisorySource: Official CVE List1 source record

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).

Announced Source revision 1
Original source ↗

CVE-2026-101341

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: cve:CVE-2026-101341

NSD

Source reference: /containers/cna/affected/0/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "vendor": "NLnet Labs",
    "product": "NSD",
    "versions": [
      {
        "status": "affected",
        "version": "4.10.0",
        "lessThan": "4.15.3",
        "versionType": "semver"
      }
    ],
    "defaultStatus": "unaffected"
  }
]
Related CVEs
CVE-2026-101341

Source reference: /cveMetadata/cveId

Publisher severity

high

Source reference: /containers/cna/metrics

Event
#21952 · Revision 1
Added to Heist Feed
Publisher date
Read the original announcement