{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-97568",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-09-24T16:01:01.155Z",
        "datePublished": "2026-09-25T10:21:54.269Z",
        "dateUpdated": "2026-10-19T09:09:31.044Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-10-19T09:09:31.044Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmptcp: syncookies: remember the request backup flag\n\nInstead of using an uninitialised bit when copying the info in\nsubflow_ulp_clone().\n\nTo fix this, no need to extend the join_entry structure: backup is\ncoming from struct mptcp_subflow_request_sock, only one bit. Do the same\nhere by using one bit for both."
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "net/mptcp/syncookies.c"
                    ],
                    "versions": [
                        {
                            "version": "1008f2bcbc8e461c1df3aebba30ac4f616ebe570",
                            "lessThan": "c97fa2c7ada82d4cac1c6c00643238dc4c462f15",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "6f01f41b6a492ddf2da7609967cfaf57e7ca48a7",
                            "lessThan": "1668b34452009d27be3262646de748a3e48ffd51",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "09176f80995105c62939728fbad5c437d61e7ff4",
                            "lessThan": "b138e7dc719f0a3949de8bb6500b8cf1604eea06",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "8ed3e34c766e8264d5d2e0436f86c51604d6a8a7",
                            "lessThan": "360d99258a6402cb8e49771460944f19f04d25b7",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "efd340bf3d7779a3a8ec954d8ec0fb8a10f24982",
                            "lessThan": "61178d0b85b4b1b53e78b06e89d018d22d102f88",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "efd340bf3d7779a3a8ec954d8ec0fb8a10f24982",
                            "lessThan": "00b2bd518911e0daab00f4749cce68c191ccebb4",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "efd340bf3d7779a3a8ec954d8ec0fb8a10f24982",
                            "lessThan": "06d649f9cd03a9f8e768a658b20acf8d2c8022e0",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "efd340bf3d7779a3a8ec954d8ec0fb8a10f24982",
                            "lessThan": "b76c0e28b392620dfbaf92cdeedbf115820b44cb",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "73e2baa301ee3f62ff971e68877adeb37f98cc67",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "5.10.224",
                            "lessThan": "5.10.271",
                            "status": "affected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.15.165",
                            "lessThan": "5.15.222",
                            "status": "affected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.1.104",
                            "lessThan": "6.1.189",
                            "status": "affected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.6.45",
                            "lessThan": "6.6.158",
                            "status": "affected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.10.4",
                            "lessThan": "6.11",
                            "status": "affected",
                            "versionType": "semver"
                        }
                    ]
                },
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "affected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "net/mptcp/syncookies.c"
                    ],
                    "versions": [
                        {
                            "version": "6.11",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "6.11",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.10.271",
                            "lessThanOrEqual": "5.10.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.15.222",
                            "lessThanOrEqual": "5.15.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.1.189",
                            "lessThanOrEqual": "6.1.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.6.158",
                            "lessThanOrEqual": "6.6.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.12.111",
                            "lessThanOrEqual": "6.12.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18.53",
                            "lessThanOrEqual": "6.18.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.2.7",
                            "lessThanOrEqual": "7.2.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.3",
                            "lessThanOrEqual": "*",
                            "status": "unaffected",
                            "versionType": "original_commit_for_fix"
                        }
                    ]
                }
            ],
            "cpeApplicability": [
                {
                    "nodes": [
                        {
                            "operator": "OR",
                            "negate": false,
                            "cpeMatch": [
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.10.224",
                                    "versionEndExcluding": "5.10.271"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.15.165",
                                    "versionEndExcluding": "5.15.222"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.1.104",
                                    "versionEndExcluding": "6.1.189"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.6.45",
                                    "versionEndExcluding": "6.6.158"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.11",
                                    "versionEndExcluding": "6.12.111"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.11",
                                    "versionEndExcluding": "6.18.53"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.11",
                                    "versionEndExcluding": "7.2.7"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.11",
                                    "versionEndExcluding": "7.3"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.10.4"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/c97fa2c7ada82d4cac1c6c00643238dc4c462f15"
                },
                {
                    "url": "https://git.kernel.org/stable/c/1668b34452009d27be3262646de748a3e48ffd51"
                },
                {
                    "url": "https://git.kernel.org/stable/c/b138e7dc719f0a3949de8bb6500b8cf1604eea06"
                },
                {
                    "url": "https://git.kernel.org/stable/c/360d99258a6402cb8e49771460944f19f04d25b7"
                },
                {
                    "url": "https://git.kernel.org/stable/c/61178d0b85b4b1b53e78b06e89d018d22d102f88"
                },
                {
                    "url": "https://git.kernel.org/stable/c/00b2bd518911e0daab00f4749cce68c191ccebb4"
                },
                {
                    "url": "https://git.kernel.org/stable/c/06d649f9cd03a9f8e768a658b20acf8d2c8022e0"
                },
                {
                    "url": "https://git.kernel.org/stable/c/b76c0e28b392620dfbaf92cdeedbf115820b44cb"
                }
            ],
            "title": "mptcp: syncookies: remember the request backup flag",
            "x_generator": {
                "engine": "bippy-1.2.0"
            }
        }
    }
}