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    "cveMetadata": {
        "cveId": "CVE-2025-64438",
        "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "state": "PUBLISHED",
        "assignerShortName": "GitHub_M",
        "dateReserved": "2025-11-03T22:12:51.366Z",
        "datePublished": "2026-02-03T19:32:22.265Z",
        "dateUpdated": "2026-02-03T20:30:50.310Z"
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                "dateUpdated": "2026-02-03T19:32:22.265Z"
            },
            "title": "Fast-DDS: Unbounded GAP range triggers OOM DoS under RELIABLE QoS",
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "lang": "en",
                            "cweId": "CWE-835",
                            "description": "CWE-835 Loop with Unreachable Exit Condition ('Infinite Loop')",
                            "type": "CWE"
                        }
                    ]
                }
            ],
            "affected": [
                {
                    "vendor": "eProsima",
                    "product": "Fast-DDS",
                    "repo": "https://github.com/eProsima/Fast-DDS",
                    "versions": [
                        {
                            "status": "affected",
                            "version": "3.4.0",
                            "lessThan": "3.4.1",
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                            "status": "affected",
                            "version": "3.0.0",
                            "lessThan": "3.3.1",
                            "versionType": "custom"
                        },
                        {
                            "status": "affected",
                            "version": "0",
                            "lessThan": "2.6.11",
                            "versionType": "custom"
                        }
                    ],
                    "defaultStatus": "unaffected"
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            ],
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                    "value": "Fast DDS is a C++ implementation of the DDS (Data Distribution Service) standard of the OMG (Object Management Group\n). 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\n-DDS when processing RTPS GAP submessages under RELIABLE QoS. By sending a tiny GAP packet with a huge gap range (`gapList\n.base - gapStart`), an attacker drives `StatefulReader::processGapMsg()` into an unbounded loop that inserts millions of s\nequence numbers into `WriterProxy::changes_received_` (`std::set`), causing multi-GB heap growth and process termination. \nNo authentication is required beyond network reachability to the reader on the DDS domain. In environments without an RSS \nlimit (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\nhe issue.",
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                            "value": "Fast DDS is a C++ implementation of the DDS (Data Distribution Service) standard of the OMG (Object Management Gr\noup). Prior to versions 3.4.1, 3.3.1, and 2.6.11, a remotely triggerable Out-of-Memory (OOM) denial-of-service exists\n in Fast-DDS when processing RTPS GAP submessages under RELIABLE QoS. By sending a tiny GAP packet with a huge gap range (\n`gapList.base - gapStart`), an attacker drives `StatefulReader::processGapMsg()` into an unbounded loop that inserts milli\nons of sequence numbers into `WriterProxy::changes_received_` (`std::set`), causing multi-GB heap growth and process termi\nnation. No authentication is required beyond network reachability to the reader on the DDS domain. In environments without\n 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\n patch the issue."
                        }
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                }
            ],
            "references": [
                {
                    "url": "https://security-tracker.debian.org/tracker/CVE-2025-64438"
                },
                {
                    "url": "https://github.com/eProsima/Fast-DDS/commit/0b0cb308eaeeb2175694aa0a0a723106824ce9a7"
                },
                {
                    "url": "https://github.com/eProsima/Fast-DDS/commit/71da01b4aea4d937558984f2cf0089f5ba3c871f"
                },
                {
                    "url": "https://github.com/eProsima/Fast-DDS/commit/8ca016134dac20b6e30e42b7b73466ef7cdbc213"
                }
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                        "version": "4.0",
                        "attackVector": "NETWORK",
                        "attackComplexity": "LOW",
                        "attackRequirements": "PRESENT",
                        "privilegesRequired": "NONE",
                        "userInteraction": "NONE",
                        "vulnConfidentialityImpact": "NONE",
                        "subConfidentialityImpact": "NONE",
                        "vulnIntegrityImpact": "NONE",
                        "subIntegrityImpact": "NONE",
                        "vulnAvailabilityImpact": "LOW",
                        "subAvailabilityImpact": "NONE",
                        "exploitMaturity": "UNREPORTED",
                        "Safety": "NOT_DEFINED",
                        "Automatable": "NOT_DEFINED",
                        "Recovery": "NOT_DEFINED",
                        "valueDensity": "NOT_DEFINED",
                        "vulnerabilityResponseEffort": "NOT_DEFINED",
                        "providerUrgency": "NOT_DEFINED",
                        "baseSeverity": "LOW",
                        "baseScore": 1.7,
                        "vectorString": "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"
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            "source": {
                "discovery": "UNKNOWN"
            },
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            {
                "metrics": [
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                                "timestamp": "2026-02-03T20:30:43.758529Z",
                                "id": "CVE-2025-64438",
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                                        "Exploitation": "none"
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