---
id: CVE-2026-22590
title: >-
  eprosima Fast DDS is a C++ implementation of the DDS (Data Distribution
  Service) standard of the OMG (Object Management Group)
summary: >-
  eprosima Fast DDS is a C++ implementation of the DDS (Data Distribution
  Service) standard of the OMG (Object Management Group). Versions prior to
  2.6.12, 2.14.6, 3.2.4, 3.3.1, and 3.4.2 have a remotely triggerable
  Out-of-Bounds Read whil…
severity: critical
cvss: 9.1
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H'
cwe:
  - CWE-125
  - CWE-131
vendor: eProsima
product: Fast-DDS
affected:
  - Fast-DDS < 2.6.12
  - 'Fast-DDS >= 2.7.0, < 2.14.6'
  - 'Fast-DDS >= 3.0.0, < 3.2.4'
  - 'Fast-DDS >= 3.3.0, < 3.3.1'
  - 'Fast-DDS >= 3.4.0, < 3.4.2'
published: '2026-09-09'
updated: '2026-09-09'
sourceUpdated: '2026-09-09T20:16:54.383'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-22590'
references:
  - url: >-
      https://github.com/eProsima/Fast-DDS/security/advisories/GHSA-7r7h-hwfj-q626
    label: security-advisories@github.com
  - url: >-
      https://github.com/eProsima/Fast-DDS/security/advisories/GHSA-7r7h-hwfj-q626
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
tags:
  - nvd
  - cve.org
  - exploit-available
exploitAvailable: true
ssvc:
  exploitation: poc
  automatable: 'yes'
  technicalImpact: partial
  timestamp: '2026-09-09T16:08:33.638883Z'
ingestedAt: '2026-09-09T16:14:05.562Z'
epss: 0.00383
epssPercentile: 0.32084
---

## Overview

eprosima Fast DDS is a C++ implementation of the DDS (Data Distribution Service) standard of the OMG (Object Management Group). Versions prior to 2.6.12, 2.14.6, 3.2.4, 3.3.1, and 3.4.2 have a remotely triggerable Out-of-Bounds Read while processing RTPS `DATA_FRAG` submessages. An attacker can craft a `DATA_FRAG` with a large `sampleSize` but a small actual payload, and set `fragmentsInSubmessage` such that the receiver treats the packet as the LAST fragment**. In this LAST-fragment path, Fast-DDS computes `incoming_length` based on `sampleSize` and calls `memcpy()` without validating `incoming_data.length >= incoming_length`. As a result, `CacheChange_t::add_fragments()` reads past the received UDP datagram buffer and into adjacent heap memory, copying those bytes into the reassembly buffer. In a Discovery Server deployment, the resulting `CacheChange_t` can be relayed to other participants, meaning that a newly joining participant may receive leaked heap memory (e.g., pointer values that could aid ASLR bypass). Versions 2.6.12, 2.14.6, 3.2.4, 3.3.1, and 3.4.2 fix the issue.

## Remediation

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