CVE-2025-64438 Details
Description
Fast DDS is a C++ implementation of the DDS (Data Distribution Service) standard of the OMG (Object Management Group ). Prior to versions 3.4.1, 3.3.1, and 2.6.11, a remotely triggerable Out-of-Memory (OOM) denial-of-service exists in Fast -DDS when processing RTPS GAP submessages under RELIABLE QoS. By sending a tiny GAP packet with a huge gap range (`gapList .base - gapStart`), an attacker drives `StatefulReader::processGapMsg()` into an unbounded loop that inserts millions of s equence numbers into `WriterProxy::changes_received_` (`std::set`), causing multi-GB heap growth and process termination. No authentication is required beyond network reachability to the reader on the DDS domain. In environments without an RSS limit (non-ASan / unlimited), memory consumption was observed to rise to ~64 GB. Versions 3.4.1, 3.3.1, and 2.6.11 patch t he issue.
A denial-of-service vulnerability causing excessive memory consumption has been identified in eProsima Fast DDS versions prior to 3.4.1, 3.3.1, and 2.6.11. The issue arises when the library processes Real-Time Publish-Subscribe (RTPS) Gap submessages under Reliable Quality of Service (QoS). An attacker can exploit this vulnerability by sending a small GAP packet with a large gap range, which triggers an unbounded loop in the 'StatefulReader::processGapMsg()' function. This loop inserts millions of sequence numbers into the 'WriterProxy::changes_received_' set, leading to multi-gigabyte heap growth and process termination. In environments without a memory limit, such as those not using AddressSanitizer, memory usage can reach approximately 64 GB.
Users can upgrade to eProsima Fast DDS versions 3.4.1, 3.3.1, or 2.6.11, where this vulnerability has been fixed.
Metrics
CVSS 4.0 Severity and Vector Strings:
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Feb 3, 2026References to Advisories, Solutions, and Tools
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Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-835 | Loop with Unreachable Exit Condition ('Infinite Loop') | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| eprosima fast dds | < 2.6.11 >= 3.0.0, < 3.3.1 3.4.0 |
CPE
Remediation
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Change History
4 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Feb 18, 2026 | Initial Analysis | [email protected] |
| Feb 3, 2026 | New CVE Received | [email protected] |