---
id: CVE-2026-121507
title: Double Free in µD3TN
summary: >-
  Double Free in µD3TN BPv6 Fragmenter Block Duplication allows Unauthenticated
  Remote Attacker to Cause DoS on Allocation Failure
severity: medium
cvss: 5.9
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H'
cvssSource: cna
cwe:
  - CWE-415
vendor: D3TN GmbH
product: µD3TN
affected:
  - µD3TN < 0.15.2
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-11-03T15:15:23.440027Z'
published: '2026-11-03'
updated: '2026-11-03'
sourceUpdated: '2026-11-03T15:29:28.089Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-121507'
references:
  - url: 'https://gitlab.com/d3tn/ud3tn/-/work_items/293'
tags:
  - cve.org
epss: 0.00377
epssPercentile: 0.31883
ingestedAt: '2026-11-05T19:30:42.985Z'
---

## Overview

Double Free in µD3TN BPv6 Fragmenter Block Duplication allows Unauthenticated Remote Attacker to Cause DoS on Allocation Failure

## Affected

- `µD3TN < 0.15.2`

## Remediation

Upgrade to version 0.15.2 or above.