CVE-2025-64438 - CVE House
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Status published Low CVE-2025-64438

Fast-DDS: Unbounded GAP range triggers OOM DoS under RELIABLE QoS

Vulnerability 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.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

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Credits & Attribution

No credits recorded in the NVD database.

References

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CVE-2025-62603
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CVE-2025-62602
FastDDS has heap buffer overflow in readData via Manipulated DATA Submessage when DDS Security is enabled
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CVE-2025-62601
FastDDS has heap buffer overflow in readString via Manipulated DATA Submessage when DDS Security is enabled
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Affected Vendor

Affected Software

Fast-DDS
Vulnerable Versions:
3.4.0, 3.0.0, 0

Timeline

Official Publish: February 3rd, 2026
Last Modified: February 3rd, 2026
Added to House: July 22nd, 2026

CVSS Vectors

Weaknesses (CWE)

CWE-835

MITRE ATT&CK TTPs

T1499 Endpoint Denial of Service
Impact
T1190 Exploit Public-Facing Application
Initial Access
T1059 Command and Scripting Interpreter
Execution
T1562 Impair Defenses
Defense Evasion
T1485 Data Destruction
Impact