{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-98569",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-09-25T10:25:14.357Z",
        "datePublished": "2026-10-18T15:18:35.413Z",
        "dateUpdated": "2026-10-19T09:21:54.816Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-10-19T09:21:54.816Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nip_gre: Reject enabling collect metadata through changelink\n\nipgre_netlink_parms() can enable collect_md on an existing GRE, GRETAP\nor ERSPAN device. Unlike newlink, changelink does not enforce metadata\ntunnel uniqueness. Converting a non-metadata device can therefore\nreplace the metadata receive entry for another device of the same type\nin the same netns. Deleting either device then clears the shared entry,\nbreaking metadata receive lookup for the surviving device.\n\nIf parameter validation fails after collect_md is set, deleting the\nmodified device can also clear an entry it never owned.\n\nReject enabling metadata mode in both changelink callbacks before any\nencapsulation or tunnel parameters are modified. Allow requests that\nrepeat the metadata attribute on an existing metadata device."
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "net/ipv4/ip_gre.c"
                    ],
                    "versions": [
                        {
                            "version": "2e15ea390e6f4466655066d97e22ec66870a042c",
                            "lessThan": "c80315da84998b69b8829785a174b0bf72a81992",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "2e15ea390e6f4466655066d97e22ec66870a042c",
                            "lessThan": "cff8b520312e750ad38967c30128e1534cbf9484",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "2e15ea390e6f4466655066d97e22ec66870a042c",
                            "lessThan": "1dc759571f3df14891175fc52527f7624ba01322",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "2e15ea390e6f4466655066d97e22ec66870a042c",
                            "lessThan": "da2e0cfbb620b199927a1e5b93b7cfde32083c7d",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "2e15ea390e6f4466655066d97e22ec66870a042c",
                            "lessThan": "2e54d53b65e296b4b4bdc2cdd3b2b58dfa8d8c5c",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "2e15ea390e6f4466655066d97e22ec66870a042c",
                            "lessThan": "bdd41b96e814300c66222cf4e47ecb8aef995656",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "2e15ea390e6f4466655066d97e22ec66870a042c",
                            "lessThan": "63c5e48d6f7f5722a48f63e13e961dc5302894ed",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "2e15ea390e6f4466655066d97e22ec66870a042c",
                            "lessThan": "a3f315be9d30eeb6938d11fa17fd4b32d52f7c42",
                            "status": "affected",
                            "versionType": "git"
                        }
                    ]
                },
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "affected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "net/ipv4/ip_gre.c"
                    ],
                    "versions": [
                        {
                            "version": "4.3",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "4.3",
                            "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": "6.12.112",
                            "lessThanOrEqual": "6.12.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18.55",
                            "lessThanOrEqual": "6.18.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.2.9",
                            "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": "4.3",
                                    "versionEndExcluding": "5.10.271"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "4.3",
                                    "versionEndExcluding": "5.15.222"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "4.3",
                                    "versionEndExcluding": "6.1.189"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "4.3",
                                    "versionEndExcluding": "6.6.158"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "4.3",
                                    "versionEndExcluding": "6.12.112"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "4.3",
                                    "versionEndExcluding": "6.18.55"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "4.3",
                                    "versionEndExcluding": "7.2.9"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "4.3",
                                    "versionEndExcluding": "7.3"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/c80315da84998b69b8829785a174b0bf72a81992"
                },
                {
                    "url": "https://git.kernel.org/stable/c/cff8b520312e750ad38967c30128e1534cbf9484"
                },
                {
                    "url": "https://git.kernel.org/stable/c/1dc759571f3df14891175fc52527f7624ba01322"
                },
                {
                    "url": "https://git.kernel.org/stable/c/da2e0cfbb620b199927a1e5b93b7cfde32083c7d"
                },
                {
                    "url": "https://git.kernel.org/stable/c/2e54d53b65e296b4b4bdc2cdd3b2b58dfa8d8c5c"
                },
                {
                    "url": "https://git.kernel.org/stable/c/bdd41b96e814300c66222cf4e47ecb8aef995656"
                },
                {
                    "url": "https://git.kernel.org/stable/c/63c5e48d6f7f5722a48f63e13e961dc5302894ed"
                },
                {
                    "url": "https://git.kernel.org/stable/c/a3f315be9d30eeb6938d11fa17fd4b32d52f7c42"
                }
            ],
            "title": "ip_gre: Reject enabling collect metadata through changelink",
            "x_generator": {
                "engine": "bippy-1.2.0"
            }
        }
    }
}