{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-101341", "assignerOrgId": "206fc3a0-e175-490b-9eaa-a5738056c9f6", "state": "PUBLISHED", "assignerShortName": "NLnet Labs", "dateReserved": "2026-09-28T14:39:03.779Z", "datePublished": "2026-10-14T10:56:51.922Z", "dateUpdated": "2026-10-14T10:56:51.922Z"}, "containers": {"cna": {"title": "Stack overwrite from specially formatted TXT-DATA RDATA field", "references": [{"url": "https://www.nlnetlabs.nl/downloads/nsd/CVE-2026-101341.txt", "tags": ["vendor-advisory"]}], "solutions": [{"lang": "en", "value": "This issue is fixed in 4.15.3 and all later versions."}], "affected": [{"vendor": "NLnet Labs", "product": "NSD", "defaultStatus": "unaffected", "versions": [{"version": "4.10.0", "status": "affected", "lessThan": "4.15.3", "versionType": "semver"}]}], "credits": [{"lang": "en", "type": "finder", "value": "Alwaleed Ashi (LXR) <waleed.9998@hotmail.com>"}], "timeline": [{"time": "2026-09-23T15:40:00.000Z", "lang": "en", "value": "Issue reported by Alwaleed Ashi (LXR)"}, {"time": "2026-09-28T14:59:00.000Z", "lang": "en", "value": "NLnet Labs shares patch"}, {"time": "2026-09-30T12:46:00.000Z", "lang": "en", "value": "Alwaleed Ashi (LXR) verifies patch"}, {"time": "2026-10-14T12:00:00.000Z", "lang": "en", "value": "Fix released with version 4.15.3"}], "datePublic": "2026-10-14T12:00:00.000Z", "descriptions": [{"lang": "en", "value": "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)."}], "metrics": [{"format": "CVSS", "scenarios": [{"lang": "en", "value": "When reading zone files, a specially crafted and formatted resource record containing a series of strings (TXT, NINFO, SPF, AVC, RESINFO and WALLET) can cause an out of bounds stack overwrite which can be exploited for execution of arbitrary commands."}], "cvssV4_0": {"version": "4.0", "baseScore": 8.7, "baseSeverity": "HIGH", "vectorString": "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"}}], "problemTypes": [{"descriptions": [{"lang": "en", "cweId": "CWE-121", "description": "CWE-121 Stack-based Buffer Overflow", "type": "CWE"}]}], "providerMetadata": {"orgId": "206fc3a0-e175-490b-9eaa-a5738056c9f6", "shortName": "NLnet Labs", "dateUpdated": "2026-10-14T10:56:51.922Z"}, "x_generator": {"engine": "cvelib 1.8.0"}}}}

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{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "NSD", "vendor": "NLnet Labs", "versions": [{"lessThan": "4.15.3", "status": "affected", "version": "4.10.0", "versionType": "semver"}]}], "source": "sep@nlnetlabs.nl"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "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)."}], "id": "CVE-2026-101341", "lastModified": "2026-10-14T11:16:57.423", "metrics": {"cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "NONE", "attackVector": "NETWORK", "availabilityRequirement": "NOT_DEFINED", "baseScore": 8.7, "baseSeverity": "HIGH", "confidentialityRequirement": "NOT_DEFINED", "exploitMaturity": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "privilegesRequired": "LOW", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "userInteraction": "NONE", "valueDensity": "NOT_DEFINED", "vectorString": "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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "version": "4.0", "vulnAvailabilityImpact": "HIGH", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "HIGH", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "sep@nlnetlabs.nl", "type": "Secondary"}]}, "published": "2026-10-14T11:16:57.423", "references": [{"source": "sep@nlnetlabs.nl", "url": "https://www.nlnetlabs.nl/downloads/nsd/CVE-2026-101341.txt"}], "sourceIdentifier": "sep@nlnetlabs.nl", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-121"}], "source": "sep@nlnetlabs.nl", "type": "Secondary"}]}

{}

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