---
id: CVE-2026-88357
title: >-
  nDPI 5.1.0 contains a memory access issue in the DNS dissector and serializer
  deserialization code
summary: >-
  nDPI 5.1.0 contains a memory access issue in the DNS dissector and serializer
  deserialization code. Specially crafted network input can cause byte-buffer
  addresses at odd offsets to be cast to uint16_t or wider integer pointers and
  direc…
severity: high
cvss: 7.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'
cwe:
  - CWE-1335
published: '2026-09-24'
updated: '2026-09-24'
sourceUpdated: '2026-09-24T21:08:55.030'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-88357'
references:
  - url: 'https://github.com/ntop/nDPI/issues/3213'
    label: cve@mitre.org
  - url: 'https://github.com/ntop/nDPI/pull/3231'
    label: cve@mitre.org
  - url: >-
      https://github.com/utoni/nDPI/commit/6698f14bf6025394a537fe23f413cf79e9d13594
    label: cve@mitre.org
  - url: >-
      https://github.com/utoni/nDPI/commit/694231bb43ff21f452fbc2b53fcf6cdc9a99f75f
    label: cve@mitre.org
  - url: >-
      https://github.com/utoni/nDPI/commit/6ce1280c52ed52a97332c3fe58fd2b47b867ec6e
    label: cve@mitre.org
  - url: >-
      https://github.com/utoni/nDPI/commit/8fc3b439920021a77165f8aee4f81b25bc88629e
    label: cve@mitre.org
  - url: 'https://github.com/ntop/nDPI/issues/3213'
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
tags:
  - nvd
  - cve.org
  - exploit-available
exploitAvailable: true
ssvc:
  exploitation: poc
  automatable: 'yes'
  technicalImpact: partial
  timestamp: '2026-09-24T17:52:11.193406Z'
ingestedAt: '2026-09-24T15:45:56.660Z'
epss: 0.00605
epssPercentile: 0.46691
---

## Overview

nDPI 5.1.0 contains a memory access issue in the DNS dissector and serializer deserialization code. Specially crafted network input can cause byte-buffer addresses at odd offsets to be cast to uint16_t or wider integer pointers and directly dereferenced without alignment checks. This results in undefined behavior and can cause process termination in UBSan-instrumented builds or on strict-alignment architectures, leading to denial of service.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.