CVE-2025-64098: FastDDS has Out-of-memory in readOctetVector via Manipulated DATA Submessage when DDS Security is enabled

Severity: medium (CVSS 5.9 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.5% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-02-03 · updated 2026-06-17
Weakness: CWE-125

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, when the security mode is enabled, modifying the DATA Submessage within an SPDP packet sent by a publisher causes an Out-Of-Memory (OOM) condition, resulting in remote termination of Fast-DDS. If t he fields of `PID_IDENTITY_TOKEN` or `PID_PERMISSIONS_TOKEN` in the DATA Submessage are tampered with — specifically by ta mpering with the the `vecsize` value read by `readOctetVector` — a 32-bit integer overflow can occur, causing `std::vector ::resize` to request an attacker-controlled size and quickly trigger OOM and remote process termination. Versions 3.4.1, 3 .3.1, and 2.6.11 patch the issue.

Affected products

Debian Linux: 11.0, 12.0, 13.0
eProsima Fast-DDS: before 2.6.11; from 3.0.0 before 3.3.1; 3.4.0 — fixed in 2.6.11, 3.3.1

How to fix

Upgrade to a fixed version: eProsima Fast-DDS 2.6.11, 3.3.1. Check the vendor advisory for mitigations.

References

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