Read the docs
TI-2025-39851 Aliases CVE-2025-64438

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

Priority LOW 11CWE-835Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Attack requirements
Present
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · Low
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-835.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.006 48th percentileScored 2026-11-07
Fix Fixed Fast-DDS (eProsima): 3.4.1, 3.3.1, 2.6.11

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
eProsimaFast-DDS3.4.0 to before 3.4.1; 3.0.0 to before 3.3.1; before 2.6.113.4.1, 3.3.1, 2.6.11Patch availableCNA
  • Fast-DDS VendoreProsima Affected 3.4.0 to before 3.4.1; 3.0.0 to before 3.3.1; before 2.6.11 Fixed in 3.4.1, 3.3.1, 2.6.11 Patch available CNA

CPE configurations NVD · 2

CPEVersionsRoleVendor
cpe:2.3:a:eprosima:fast_dds:*:*:*:*:*:*:*:*before 2.6.11; 3.0.0 to before 3.3.1VulnerableeProsima
cpe:2.3:a:eprosima:fast_dds:3.4.0:*:*:*:*:*:*:*3.4.0VulnerableeProsima
  • cpe:2.3:a:eprosima:fast_dds:*:*:*:*:*:*:*:* Versions before 2.6.11; 3.0.0 to before 3.3.1 Vulnerable ·eProsima
  • cpe:2.3:a:eprosima:fast_dds:3.4.0:*:*:*:*:*:*:* Versions 3.4.0 Vulnerable ·eProsima

Remediation

  • Fix · CNA Fast-DDS (eProsima) Fixed in 3.4.1, 3.3.1, 2.6.11

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    eProsima Fast-DDS 2.6.11, 3.3.1, 3.4.1

    6 records Highest priority Priority LOW 6 LOW

    Other records, highest priority first

    • TI-2025-38982 FastDDS's heap buffer overflow in RTPS DATA_FRAG enables unauthenticated DoS (potential RCE)Priority LOW 34
    • TI-2025-38818 FastDDS has Out-of-memory while parsing GenericMessage when DDS Security is enabledPriority LOW 16
    • TI-2025-38817 FastDDS has heap buffer overflow in readData via Manipulated DATA Submessage when DDS Security is enabledPriority LOW 16
    Show all 6 records →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2025-64438

References

Patch 3

Advisory 1

  • TI-2025-38815 Integer overflow in eProsima Fast-DDS CVSS 3.1HIGH 8.6
  • TI-2024-18790 Manipulated DATA Submessage causes a heap-buffer-overflow error CVSS 3.1CRITICAL 9.7
  • TI-2023-27485 Disconnect Vulnerability in RTPS Packets Used by SROS2 CVSS 3.1CRITICAL 9.7
  • TI-2024-20005 FastDDS heap buffer overflow when publisher sends malformed packet CVSS 3.1HIGH 8.2
  • TI-2023-20840 Another heap overflow in push_back_helper CVSS 3.1HIGH 8.2
  • TI-2023-20839 Heap overflow in push_back_helper due to a CDR message CVSS 3.1HIGH 8.2
See all 26 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences