---
id: "CVE-2026-112274"
kind: "vulnerability"
aliases: ["CVE-2026-112274"]
title: "libtins: out-of-bounds read in DNS SOA parsing crashes or leaks heap"
severity: "medium"
cvss: 6.3
epss: null
exploited: false
status: "open"
category: "package"
products: []
ecosystems: []
tags: ["c++", "libtins", "network-tools", "package"]
not_affected_if: ["no-untrusted-dns-input"]
published_at: "2026-10-19T14:17:05+00:00"
first_seen_at: "2026-10-23T21:57:18+00:00"
updated_at: "2026-10-25T04:01:42+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-112274", "first_seen_at": "2026-10-23T21:57:18+00:00"}]
---

# libtins: out-of-bounds read in DNS SOA parsing crashes or leaks heap

libtins is a C++ networking library whose DNS SOA record parser calls strlen on attacker-supplied data without checking for a NUL terminator. A remote sender can make it read past the heap buffer, which can crash the application and may expose adjacent memory.

_Summary, check and fix written by a model from the sources; labelled as such._

## How to check

- unknown

## Fix

- unknown

## Timeline

- 2026-10-23T21:57:18+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-112274

## From the sources

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.

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_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_