CVE-2023-39949

Name: CVE-2023-39949
Creator: NVD / NIST
Published: 2023-08-11T14:15:13.807+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 0.89%

Last modified Jun 17, 2026

CVE-2023-39949 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. eprosima Fast DDS is a C++ implementation of the Data Distribution Service standard of the Object Management Group. Prior to versions 2.9.1 and 2.6.5, improper validation of sequence numbers may lead to remotely reachable assertion failure. EPSS estimates a 0.89% chance of exploitation in the next 30 days.

Description

eprosima Fast DDS is a C++ implementation of the Data Distribution Service standard of the Object Management Group. Prior to versions 2.9.1 and 2.6.5, improper validation of sequence numbers may lead to remotely reachable assertion failure. This can remotely crash any Fast-DDS process. Versions 2.9.1 and 2.6.5 contain a patch for this issue.

Metrics

CVSS 3.1

7.5/10

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

EPSS Probability

0.89%

54.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-617

Affected Software

Vendor	Product	Versions
Eprosima	Fast Dds	>= 2.6.0, < 2.6.5
Eprosima	Fast Dds	2.9.0
Debian	Debian Linux	11.0
Debian	Debian Linux	12.0

References

https://github.com/eProsima/Fast-DDS/blob/v2.9.0/src/cpp/rtps/messages/MessageReceiver.cpp#L1059Third Party Advisory
https://github.com/eProsima/Fast-DDS/issues/3236Third Party Advisory
https://github.com/eProsima/Fast-DDS/security/advisories/GHSA-3jv9-j9x3-95cgThird Party Advisory
https://www.debian.org/security/2023/dsa-5481Third Party Advisory
https://github.com/eProsima/Fast-DDS/blob/v2.9.0/src/cpp/rtps/messages/MessageReceiver.cpp#L1059Third Party Advisory
https://github.com/eProsima/Fast-DDS/issues/3236Third Party Advisory
https://github.com/eProsima/Fast-DDS/security/advisories/GHSA-3jv9-j9x3-95cgThird Party Advisory
https://www.debian.org/security/2023/dsa-5481Third Party Advisory

Timeline

Published: Aug 11, 2023
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2023-39949?

How severe is CVE-2023-39949?

CVE-2023-39949 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 0.89% probability of exploitation in the next 30 days.

How do I fix CVE-2023-39949?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2023-39949?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST