CVE-2025-64438Public exploitNetwork attack vector

Remote process termination via unbounded GAP iteration

Published Feb 3, 2026 · Updated Feb 3, 2026

Out-of-memory denial of service in eProsima Fast DDS before 2.6.11, 3.0.0 through 3.3.0, and 3.4.0 allows remote attackers to terminate readers. StatefulReader::processGapMsg() iterates over the attacker-controlled interval from gapStart to gapList.base without a range bound and inserts every sequence number into WriterProxy::changes_received_, exhausting heap memory. Network access to a RELIABLE reader on the DDS domain is sufficient; a small crafted RTPS GAP submessage causes extreme memory growth, process termination, or severe service degradation.

CVSS severity7.5
High
EPSS probability0.56%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-memory denial of service in eProsima Fast DDS before 2.6.11, 3.0.0 through 3.3.0, and 3.4.0 allows remote attackers to terminate readers. StatefulReader::processGapMsg() iterates over the attacker-controlled interval from gapStart to gapList.base without a range bound and inserts every sequence number into WriterProxy::changes_received_, exhausting heap memory. Network access to a RELIABLE reader on the DDS domain is sufficient; a small crafted RTPS GAP submessage causes extreme memory growth, process termination, or severe service degradation.

The record

CVE
CVE-2025-64438
Published
Feb 3, 2026
Updated
Feb 3, 2026
Vendor
eProsima
Product
Fast DDS
Classifications
CWE-400, CWE-770, CWE-835, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 3, 2026CVE publishedPublication date reported by the CVE source.
  2. Feb 3, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <2.6.11
  2. Affected versionversion=3.0.0 <3.3.1
  3. Affected versionversion=3.4.0 <3.4.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

eProsima · Fast DDSversion=0 <2.6.11; version=3.0.0 <3.3.1; version=3.4.0 <3.4.1

Published CVSS scores

7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
7.5GitHub Security AdvisoryCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
1.7GitHub, Inc.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

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-400Uncontrolled Resource Consumption
CWE-770Allocation of Resources Without Limits or Throttling
CWE-835Loop with Unreachable Exit Condition ('Infinite Loop')
T1499.004Application or System Exploitation

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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