Excessive Iteration in Fast DDS - CVE-2025-65016
Published: April 9, 2026
Vulnerability identifier: #VU125726
CSH Severity: High
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2025-65016
CWE-ID: CWE-834
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to excessive iteration in StatefulReader::NotifyChanges() when processing RTPS HEARTBEAT submessages with a crafted large firstSequenceNumber value under RELIABLE QoS. A remote attacker can send a specially crafted HEARTBEAT packet to cause a denial of service.
Exploitation requires network reachability to the reader on the DDS domain and endpoint matching to have created a WriterProxy on the subscriber.
Affected software
Fast DDS
How to mitigate CVE-2025-65016
Install security update from vendor's website.
Fast DDS - addressed in versions 2.6.11, 2.14.6, 3.3.1, 3.4.2