eProsima Fast-DDS up to 3.4.1 add_fragments out-of-bounds

Summaryinfo

A vulnerability categorized as critical has been discovered in eProsima Fast-DDS up to 2.6.11/2.14.5/3.2.3/3.3.0/3.4.1. This affects the function CacheChange_t::add_fragments. Executing a manipulation can lead to out-of-bounds. The identification of this vulnerability is CVE-2026-22590. The attack may be launched remotely. There is no exploit available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in eProsima Fast-DDS up to 2.6.11/2.14.5/3.2.3/3.3.0/3.4.1. It has been declared as critical. This vulnerability affects the function CacheChange_t::add_fragments. The manipulation with an unknown input leads to a out-of-bounds vulnerability. The CWE definition for the vulnerability is CWE-125. The product reads data past the end, or before the beginning, of the intended buffer. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

eprosima Fast DDS is a C++ implementation of the DDS (Data Distribution Service) standard of the OMG (Object Management Group). Versions prior to 2.6.12, 2.14.6, 3.2.4, 3.3.1, and 3.4.2 have a remotely triggerable Out-of-Bounds Read while processing RTPS `DATA_FRAG` submessages. An attacker can craft a `DATA_FRAG` with a large `sampleSize` but a small actual payload, and set `fragmentsInSubmessage` such that the receiver treats the packet as the LAST fragment**. In this LAST-fragment path, Fast-DDS computes `incoming_length` based on `sampleSize` and calls `memcpy()` without validating `incoming_data.length >= incoming_length`. As a result, `CacheChange_t::add_fragments()` reads past the received UDP datagram buffer and into adjacent heap memory, copying those bytes into the reassembly buffer. In a Discovery Server deployment, the resulting `CacheChange_t` can be relayed to other participants, meaning that a newly joining participant may receive leaked heap memory (e.g., pointer values that could aid ASLR bypass). Versions 2.6.12, 2.14.6, 3.2.4, 3.3.1, and 3.4.2 fix the issue.

The advisory is available at github.com. This vulnerability was named CVE-2026-22590 since 01/07/2026. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. Technical details are known, but there is no available exploit.

Upgrading to version 2.6.12, 2.14.6, 3.2.4, 3.3.1 or 3.4.2 eliminates this vulnerability.

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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
• 2.6.11
• 2.14.0
• 2.14.1
• 2.14.2
• 2.14.3
• 2.14.4
• 2.14.5
• 3.0
• 3.1
• 3.2
• 3.2.0
• 3.2.1
• 3.2.2
• 3.2.3
• 3.3.0
• 3.4.0
• 3.4.1

Website

• Product: https://github.com/eProsima/Fast-DDS/

CPE 2.3info

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CPE 2.2info

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