eProsima Fast-DDS up to 2.6.10/3.3.0/3.4.0 processGapMsg infinite loop

Summaryinfo

A vulnerability, which was classified as problematic, was found in eProsima Fast-DDS up to 2.6.10/3.3.0/3.4.0. Affected by this vulnerability is the function StatefulReader::processGapMsg. Executing a manipulation can lead to infinite loop. This vulnerability is registered as CVE-2025-64438. It is possible to launch the attack remotely. No exploit is available. You should upgrade the affected component.

Detailsinfo

A vulnerability classified as problematic was found in eProsima Fast-DDS up to 2.6.10/3.3.0/3.4.0. This vulnerability affects the function StatefulReader::processGapMsg. The manipulation with an unknown input leads to a infinite loop vulnerability. The CWE definition for the vulnerability is CWE-835. The product contains an iteration or loop with an exit condition that cannot be reached, i.e., an infinite loop. As an impact it is known to affect availability. CVE summarizes:

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.

The advisory is shared for download at security-tracker.debian.org. This vulnerability was named CVE-2025-64438 since 11/03/2025. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1499.

Upgrading to version 2.6.11, 3.3.1 or 3.4.1 eliminates this vulnerability.

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Productinfo

Vendor

• eProsima

Name

• Fast-DDS

Version

• 2.6.0
• 2.6.1
• 2.6.2
• 2.6.3
• 2.6.4
• 2.6.5
• 2.6.6
• 2.6.7
• 2.6.8
• 2.6.9
• 2.6.10
• 3.0
• 3.1
• 3.2
• 3.3
• 3.3.0
• 3.4.0

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CPE 2.2info

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