Fast DDS is a C++ implementation of the DDS (Data Distribution Service) standard of the OMG (Object Management Group
). ParticipantGenericMessage is the DDS Security control-message container that carries not only the handshake but also on
going security-control traffic after the handshake, such as crypto-token exchange, rekeying, re-authentication, and token
delivery for newly appearing endpoints. On receive, the CDR parser is invoked first and deserializes the `message_data` (i
.e., the `DataHolderSeq`) via the `readParticipantGenericMessage → readDataHolderSeq` path. The `DataHolderSeq` is parsed
sequentially: a sequence count (`uint32`), and for each DataHolder the `class_id` string (e.g. `DDS:Auth:PKI-DH:1.0+Req`),
string properties (a sequence of key/value pairs), and binary properties (a name plus an octet-vector). The parser operat
es at a stateless level and does not know higher-layer state (for example, whether the handshake has already completed), s
o it fully unfolds the structure before distinguishing legitimate from malformed traffic. Because RTPS permits duplicates,
delays, and retransmissions, a receiver must perform at least minimal structural parsing to check identity and sequence n
umbers before discarding or processing a message; the current implementation, however, does not "peek" only at a minimal
header and instead parses the entire `DataHolderSeq`. As a result, prior to versions 3.4.1, 3.3.1, and 2.6.11, this parsi
ng behavior can trigger an out-of-memory condition and remotely terminate the process. Versions 3.4.1, 3.3.1, and 2.6.11 p
atch the issue.
CVSS
No CVSS.
References
Configurations
No configuration.
History
03 Feb 2026, 20:15
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2026-02-03 20:15
Updated : 2026-02-04 16:33
NVD link : CVE-2025-62603
Mitre link : CVE-2025-62603
CVE.ORG link : CVE-2025-62603
JSON object : View
Products Affected
No product.
CWE
CWE-125
Out-of-bounds Read