fastdds — security advisory
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.
- Products
- fastdds
- Affected versions
- 2.1.0+ds-9, 2.10.1+ds-3, 2.11.2+ds-6, 2.11.2+ds-6.1build2, 2.11.2+ds-6.1build3, 2.11.2+ds-6ubuntu1, 2.4.1+ds-1, 2.5.0+ds-3, 2.5.0+ds-3ubuntu0.1~esm1, 3.1.2+ds-1, 3.1.2+ds-1build1, 3.3.0+ds-3ubuntu1, 3.3.0+ds-3ubuntu3
- Fixed versions
- Not specified
- CVEs
- CVE-2025-64438
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 01:34 UTC · Revision 1
Source evidence
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.
osv:UBUNTU-CVE-2025-64438
fastdds
Fixed versions: Not specified
fastdds
Fixed versions: Not specified
fastdds
Fixed versions: Not specified
fastdds
Fixed versions: Not specified
fastdds
Fixed versions: Not specified
Complete source record
{
"id": "543af34d5434863d0506f93d06f0847894adaeceb090e8a2aabe8a9c537e412a",
"url": "https://osv.dev/vulnerability/UBUNTU-CVE-2025-64438",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "UBUNTU-CVE-2025-64438",
"summary": "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.",
"evidence": "osv:UBUNTU-CVE-2025-64438",
"products": [
{
"name": {
"value": "fastdds",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "2.1.0+ds-9",
"evidence": "/affected/0/versions"
},
{
"value": "2.4.1+ds-1",
"evidence": "/affected/0/versions"
},
{
"value": "2.5.0+ds-3",
"evidence": "/affected/0/versions"
},
{
"value": "2.5.0+ds-3ubuntu0.1~esm1",
"evidence": "/affected/0/versions"
}
]
},
{
"name": {
"value": "fastdds",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "2.10.1+ds-3",
"evidence": "/affected/1/versions"
},
{
"value": "2.11.2+ds-6",
"evidence": "/affected/1/versions"
},
{
"value": "2.11.2+ds-6ubuntu1",
"evidence": "/affected/1/versions"
},
{
"value": "2.11.2+ds-6.1build2",
"evidence": "/affected/1/versions"
},
{
"value": "2.11.2+ds-6.1build3",
"evidence": "/affected/1/versions"
}
]
},
{
"name": {
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"evidence": "/affected/2/package/name"
},
"prerequisites": [],
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"affected_versions": [
{
"value": "3.1.2+ds-1",
"evidence": "/affected/2/versions"
},
{
"value": "3.1.2+ds-1build1",
"evidence": "/affected/2/versions"
}
]
},
{
"name": {
"value": "fastdds",
"evidence": "/affected/3/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "3.3.0+ds-3ubuntu1",
"evidence": "/affected/3/versions"
},
{
"value": "3.3.0+ds-3ubuntu3",
"evidence": "/affected/3/versions"
}
]
},
{
"name": {
"value": "fastdds",
"evidence": "/affected/4/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "3.1.2+ds-1build1",
"evidence": "/affected/4/versions"
},
{
"value": "3.3.0+ds-3ubuntu1",
"evidence": "/affected/4/versions"
}
]
}
],
"severity": "high",
"structured": {
"id": "UBUNTU-CVE-2025-64438",
"aliases": [
"UBUNTU-CVE-2025-64438"
],
"metrics": [
{
"type": "CVSS_V4",
"score": "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"
},
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
},
{
"type": "Ubuntu",
"score": "medium"
}
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "fastdds",
"purl": "pkg:deb/ubuntu/fastdds?arch=source&distro=esm-apps%2Fjammy",
"ecosystem": "Ubuntu:Pro:22.04:LTS"
},
"versions": [
"2.1.0+ds-9",
"2.4.1+ds-1",
"2.5.0+ds-3",
"2.5.0+ds-3ubuntu0.1~esm1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-64438.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "fastdds-tools",
"binary_version": "2.5.0+ds-3ubuntu0.1~esm1"
},
{
"binary_name": "libfastrtps2.5",
"binary_version": "2.5.0+ds-3ubuntu0.1~esm1"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
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}
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}
],
"package": {
"name": "fastdds",
"purl": "pkg:deb/ubuntu/fastdds?arch=source&distro=noble",
"ecosystem": "Ubuntu:24.04:LTS"
},
"versions": [
"2.10.1+ds-3",
"2.11.2+ds-6",
"2.11.2+ds-6ubuntu1",
"2.11.2+ds-6.1build2",
"2.11.2+ds-6.1build3"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-64438.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "fastdds-tools",
"binary_version": "2.11.2+ds-6.1build3"
},
{
"binary_name": "libfastrtps2.11t64",
"binary_version": "2.11.2+ds-6.1build3"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
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],
"package": {
"name": "fastdds",
"purl": "pkg:deb/ubuntu/fastdds?arch=source&distro=questing",
"ecosystem": "Ubuntu:25.10"
},
"versions": [
"3.1.2+ds-1",
"3.1.2+ds-1build1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-64438.json"
},
"ecosystem_specific": {
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{
"binary_name": "fastdds-tools",
"binary_version": "3.1.2+ds-1build1"
},
{
"binary_name": "libfastdds3.1",
"binary_version": "3.1.2+ds-1build1"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
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{
"introduced": "0"
}
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],
"package": {
"name": "fastdds",
"purl": "pkg:deb/ubuntu/fastdds?arch=source&distro=stonking",
"ecosystem": "Ubuntu:26.10"
},
"versions": [
"3.3.0+ds-3ubuntu1",
"3.3.0+ds-3ubuntu3"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-64438.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "fastdds-tools",
"binary_version": "3.3.0+ds-3ubuntu3"
},
{
"binary_name": "libfastdds3.3",
"binary_version": "3.3.0+ds-3ubuntu3"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
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{
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}
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],
"package": {
"name": "fastdds",
"purl": "pkg:deb/ubuntu/fastdds?arch=source&distro=resolute",
"ecosystem": "Ubuntu:26.04:LTS"
},
"versions": [
"3.1.2+ds-1build1",
"3.3.0+ds-3ubuntu1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-64438.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "fastdds-tools",
"binary_version": "3.3.0+ds-3ubuntu1"
},
{
"binary_name": "libfastdds3.3",
"binary_version": "3.3.0+ds-3ubuntu1"
}
]
}
}
],
"modified": "2026-10-17T12:57:11.140298044Z",
"provider": "osv",
"upstream": [
"CVE-2025-64438"
],
"references": [
"https://ubuntu.com/security/CVE-2025-64438",
"https://www.cve.org/CVERecord?id=CVE-2025-64438",
"https://github.com/eProsima/Fast-DDS/commit/0b0cb308eaeeb2175694aa0a0a723106824ce9a7"
]
},
"related_cves": [
{
"value": "CVE-2025-64438",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/1/score"
},
"source_id": "core-osv",
"document_id": 356844,
"published_at": "2026-02-03T20:15:00+00:00"
}