CVE-2025-64438VulnerabilityPublished 3 Feb 2026

CVE-2025-64438: eProsima Fast-DDS · Infinite Loop

Affects eProsima Fast-DDSSource CVE Database V5

Not known to be exploited · CVSS 1.7 Low · fixed in 3.4.1 : update eProsima Fast-DDS when convenient.

Data as of 26 Oct 2026, 07:57 UTC

CVSS 4.0 base score

1.7Low

How severe the flaw is on the 0–10 CVSS scale.

EPSS: 0.6% chance of exploitation in 30 days – higher than 48% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in 3.4.1, 3.3.1, 2.6.11

CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U

Base metrics

Attack Vector: Network
Attack Complexity: Low
Attack Requirements: Present
Privileges Required: None
User Interaction: None
Vulnerable system confidentiality: None
Vulnerable system integrity: None
Vulnerable system availability: Low
Subsequent system confidentiality: None
Subsequent system integrity: None
Subsequent system availability: None

Threat metrics

Exploit Maturity: Unreported

Bold values are the worst case: easiest to exploit or largest impact.

Attack Vector: Network: The vulnerable system is bound to the network stack and the set of possible attackers extends beyond the other options listed below, up to and including the entire Internet. Such a vulnerability is often termed “remotely exploitable” and can be thought of as an attack being exploitable at the protocol level one or more network hops away (e.g., across one or more routers).
Attack Complexity: Low: The attacker must take no measurable action to exploit the vulnerability. The attack requires no target-specific circumvention to exploit the vulnerability. An attacker can expect repeatable success against the vulnerable system.
Attack Requirements: Present: The successful attack depends on the presence of specific deployment and execution conditions of the vulnerable system that enable the attack. These include: a race condition must be won to successfully exploit the vulnerability (the successfulness of the attack is conditioned on execution conditions that are not under full control of the attacker, or the attack may need to be launched multiple times against a single target before being successful); the attacker must inject themselves into the logical network path between the target and the resource requested by the victim (e.g. vulnerabilities requiring an on-path attacker).
Privileges Required: None: The attacker is unauthorized prior to attack, and therefore does not require any access to settings or files of the vulnerable system to carry out an attack.
User Interaction: None: The vulnerable system can be exploited without interaction from any human user, other than the attacker.
Vulnerable system confidentiality: None: There is no loss of confidentiality within the Vulnerable System.
Vulnerable system integrity: None: There is no loss of integrity within the Vulnerable System.
Vulnerable system availability: Low: Performance is reduced or there are interruptions in resource availability. Even if repeated exploitation of the vulnerability is possible, the attacker does not have the ability to completely deny service to legitimate users. The resources in the Vulnerable System are either partially available all of the time, or fully available only some of the time, but overall there is no direct, serious consequence to the Vulnerable System.
Subsequent system confidentiality: None: There is no loss of confidentiality within the Subsequent System or all confidentiality impact is constrained to the Vulnerable System.
Subsequent system integrity: None: There is no loss of integrity within the Subsequent System or all integrity impact is constrained to the Vulnerable System.
Subsequent system availability: None: There is no impact to availability within the Subsequent System or all availability impact is constrained to the Vulnerable System.
Exploit Maturity: Unreported: Based on threat intelligence sources each of the following must apply: · No knowledge of publicly available proof-of-concept · No knowledge of reported attempts to exploit this vulnerability · No knowledge of publicly available solutions used to simplify attempts to exploit the vulnerability

Definitions: FIRST CVSS v4.0 specification.

Exploitation evidence

Disclosed: evidence found.
CVE published 3 Feb 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 2026-10-26.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponised: Public exploit code exists in Metasploit or Exploit-DB, or CISA SSVC reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Upgrade eProsima Fast-DDS to 3.4.1, 3.3.1 or 2.6.11.

Affected software

Product	Affected	Fixed in
eProsimaFast-DDS	Affected >=3.4.0 <3.4.1 >=3.0.0 <3.3.1 <2.6.11	Fixed in 3.4.1 3.3.1 2.6.11
GitHubeprosima/Fast-DDS`pkg:github/eprosima/Fast-DDS`Other threats	Affected =0 =3.0.0 =3.4.0	Fixed in–
GitHubFast-DDS`pkg:github/Fast-DDS`Other threats	Affected >=3.4.0 <3.4.1 >=3.0.0 <3.3.1 <2.6.11	Fixed in 3.4.1 3.3.1 2.6.11

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

1. Upgrade eProsima Fast-DDS to versions 3.4.1, 3.3.1, or 2.6.11 or later where the vulnerability is patched. 2. Implement network segmentation and restrict access to DDS domain readers to trusted hosts only, minimizing exposure to untrusted networks. 3. Employ network-level filtering to block malformed or suspicious RTPS GAP submessages, if feasible. 4. Monitor memory usage of Fast-DDS processes and set resource limits to prevent excessive memory consumption. 5. Use intrusion detection systems capable of recognizing anomalous DDS traffic patterns. 6. Conduct regular security assessments of DDS deployments, including penetration testing focused on protocol fuzzing. 7. Where possible, enable authentication and encryption features of DDS to reduce unauthorized access risk. 8. Maintain up-to-date incident response plans for denial-of-service scenarios affecting real-time communication middleware.

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, a remotely triggerable Out-of-Memory (OOM) denial-of-service exists in Fast -DDS when processing RTPS GAP submessages under RELIABLE QoS. By sending a tiny GAP packet with a huge gap range (`gapList .base - gapStart`), an attacker drives `StatefulReader::processGapMsg()` into an unbounded loop that inserts millions of s equence numbers into `WriterProxy::changes_received_` (`std::set`), causing multi-GB heap growth and process termination. No authentication is required beyond network reachability to the reader on the DDS domain. In environments without an RSS limit (non-ASan / unlimited), memory consumption was observed to rise to ~64 GB. Versions 3.4.1, 3.3.1, and 2.6.11 patch t he issue.

Impact

For European organizations, the impact of this vulnerability depends on the deployment of Fast-DDS in critical infrastructure, industrial automation, automotive, aerospace, or other real-time systems that rely on DDS for data communication. Exploitation can cause denial-of-service by exhausting system memory, leading to service interruptions and potential safety risks in operational technology environments. Organizations with network-exposed DDS readers are at risk without requiring authentication, increasing the attack surface. The large memory consumption can also affect system stability and availability, potentially disrupting business-critical processes. While the CVSS score is low, the operational impact in real-time or safety-critical systems can be significant. European sectors such as manufacturing, automotive, and defense that use DDS-based middleware should be particularly vigilant.

Summary

The vulnerability CVE-2025-64438 affects eProsima Fast-DDS, a C++ implementation of the OMG DDS standard used for real-time data distribution. In versions prior to 3.4.1, 3.3.1, and 2.6.11, an attacker can remotely trigger an infinite loop within the StatefulReader::processGapMsg() function by sending a crafted RTPS GAP submessage with a large gap range. This causes the function to insert an excessive number of sequence numbers into the WriterProxy::changes_received_ set, a data structure implemented as a std::set, resulting in unbounded memory allocation. The memory consumption can grow to tens of gigabytes (observed up to ~64 GB), leading to out-of-memory conditions and process crashes, effectively causing a denial-of-service (DoS). The attack requires no authentication beyond network access to the DDS domain reader, making it remotely exploitable. The vulnerability stems from a loop with an unreachable exit condition (CWE-835), where the logic does not properly limit the number of iterations when processing the gap list. The issue is patched in Fast-DDS versions 3.4.1, 3.3.1, and 2.6.11. No known exploits have been reported in the wild as of the publication date.

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Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 3 Feb 2026, 20:00 UTC

WeaknessesCWE-835

Technical details

References

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