Fast-DDS Discovery Server: Out-of-Bounds Read & Heap Memory Disclosure via DATA_FRAG  sampleSize / fragmentsInSubmessage

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-22590
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-09-09 16:17:02 UTC
Updated2026-09-09 20:16:54 UTC
Descriptioneprosima 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.

Risk And Classification

Primary CVSS: v3.1 9.1 CRITICAL from [email protected]

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

EPSS: 0.003830000 probability, percentile 0.316520000 (date 2026-09-10)

Problem Types: CWE-125 | CWE-131 | CWE-125 CWE-125: Out-of-bounds Read | CWE-131 CWE-131: Incorrect Calculation of Buffer Size

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary9.1CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
3.1CNADECLARED9.1CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
High

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA EProsima Fast-DDS affected < 2.6.12 Not specified
CNA EProsima Fast-DDS affected >= 2.7.0, < 2.14.6 Not specified
CNA EProsima Fast-DDS affected >= 3.0.0, < 3.2.4 Not specified
CNA EProsima Fast-DDS affected >= 3.3.0, < 3.3.1 Not specified
CNA EProsima Fast-DDS affected >= 3.4.0, < 3.4.2 Not specified

References

ReferenceSourceLinkTags
github.com/eProsima/Fast-DDS/security/advisories/GHSA-7r7h-hwfj-q626 134c704f-9b21-4f2e-91b3-4a467353bcc0 github.com
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