CVE-2023-39947Public exploitNetwork attack vector

Remote process crash via malformed property list

Published Aug 11, 2023 · Updated Feb 13, 2025

Heap-based buffer overflow in eProsima Fast DDS allows remote attackers to crash affected processes through malformed RTPS packets. While parsing PID_PROPERTY_LIST, push_back_helper copies a 17-byte property value into a 16-byte heap allocation after trusting an attacker-controlled 32-bit size. Any network-reachable Fast DDS process on the targeted domain can be crashed without authentication or user interaction.

CVSS severity8.2
High
EPSS probability0.96%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Heap-based buffer overflow in eProsima Fast DDS allows remote attackers to crash affected processes through malformed RTPS packets. While parsing PID_PROPERTY_LIST, push_back_helper copies a 17-byte property value into a 16-byte heap allocation after trusting an attacker-controlled 32-bit size. Any network-reachable Fast DDS process on the targeted domain can be crashed without authentication or user interaction.

The record

CVE
CVE-2023-39947
Published
Aug 11, 2023
Updated
Feb 13, 2025
Vendor
eProsima
Product
Fast DDS
Classifications
CWE-122, T1499
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 11, 2023CVE publishedPublication date reported by the CVE source.
  2. Feb 13, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=>= 2.10.0, < 2.10.2
  2. Affected versionversion== 2.11.0
  3. Affected versionversion=< 2.6.6
  4. Affected versionversion=>= 2.7.0, < 2.9.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

eProsima · Fast DDSversion=>= 2.10.0, < 2.10.2; version== 2.11.0; version=< 2.6.6; version=>= 2.7.0, < 2.9.2

Published CVSS scores

8.2GitHubCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-122Heap-based Buffer Overflow
T1499Endpoint Denial of Service

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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