libtins through 4.6 contains an out-of-bounds read vulnerability in DNS::soa_record::init that allows remote attackers to read past buffer bounds by supplying SOA data lacking NUL terminators. Attackers can feed raw SOA RDATA without a zero byte to applications using the buffer constructor, causing strlen to overrun the heap buffer and possibly crash.

Attack Vector Network

Attack Complexity High

Privileges Required None

Attack Requirements Present

User Interaction None

Vulnerable System Confidentiality Impact None

Vulnerable System Integrity Impact None

Vulnerable System Availability Impact Low

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

Attack Vector Network

Attack Complexity High

Privileges Required None

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact Low

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Exploitation poc

Automatable no

Technical Impact partial

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
libtins libtins unaffected
Version Status Constraints
0 affected ≤ 4.6

No data.

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Project Subscriptions

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Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://github.com/mfontanini/libtins cve-icon cve-icon
https://github.com/mfontanini/libtins/blob/v4.6/src/dns.cpp#L698-L710 cve-icon cve-icon
https://hackmd.io/@haindpwn/libtins-dns-name-parsing-oob-read cve-icon cve-icon cve-icon
https://www.vulncheck.com/advisories/libtins-through-4.6-out-of-bounds-read-via-dns-soa-record-init cve-icon cve-icon
History

Mon, 19 Oct 2026 18:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Mon, 19 Oct 2026 14:00:00 +0000

Type Values Removed Values Added
Description libtins through 4.6 contains an out-of-bounds read vulnerability in DNS::soa_record::init that allows remote attackers to read past buffer bounds by supplying SOA data lacking NUL terminators. Attackers can feed raw SOA RDATA without a zero byte to applications using the buffer constructor, causing strlen to overrun the heap buffer and possibly crash.
Title libtins through 4.6 Out-of-Bounds Read via DNS::soa_record::init
Weaknesses CWE-125
References
Metrics cvssV3_1

{'score': 3.7, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L'}

cvssV4_0

{'score': 6.3, 'vector': 'CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-10-19T17:57:12.363Z

Reserved: 2026-10-19T13:25:28.669Z

Link: CVE-2026-112274

cve-icon Vulnrichment

Updated: 2026-10-19T17:57:06.934Z

cve-icon NVD

Status : Deferred

Published: 2026-10-19T14:17:05.223

Modified: 2026-10-19T21:14:14.150

Link: CVE-2026-112274

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-10-19T15:45:17Z

Weaknesses