{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-98102",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-09-25T10:25:14.315Z",
        "datePublished": "2026-09-25T10:35:53.332Z",
        "dateUpdated": "2026-10-19T09:13:54.775Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-10-19T09:13:54.775Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nipv6: mcast: fix RCU list diversion in ip6_mc_del1_src()\n\nWhen removing a source filter whose count reaches zero, ip6_mc_del1_src()\nunlinks psf from pmc->mca_sources. If the filter was previously active,\nthe code moved psf directly into pmc->mca_tomb by updating psf->sf_next.\n\nBecause pmc->mca_sources is traversed locklessly under RCU (e.g. by\nipv6_chk_mcast_addr()), mutating psf->sf_next before a grace period\nelapses diverts concurrent readers to the tombstone list. Consequently,\nreaders miss remaining active sources in pmc->mca_sources and improperly\nexamine deleted tombstone entries.\n\nFix this by allocating a new tombstone node for pmc->mca_tomb (as done\nin sf_setstate()) and retiring the original psf via kfree_rcu()."
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "net/ipv6/mcast.c"
                    ],
                    "versions": [
                        {
                            "version": "4b200e398953c237c86d32bf26d4cb2a96556a6f",
                            "lessThan": "c3343cd7ec8706c221e52b782f386b9af14a928a",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "4b200e398953c237c86d32bf26d4cb2a96556a6f",
                            "lessThan": "4352737297b262e8367675c19a7dc6a9f53c97af",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "4b200e398953c237c86d32bf26d4cb2a96556a6f",
                            "lessThan": "8d4fe5c13f5056faa6deb09a90e24a89f9ebfad4",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "4b200e398953c237c86d32bf26d4cb2a96556a6f",
                            "lessThan": "5149c60c406595b56fda0c6e9aae7fd287f636aa",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "4b200e398953c237c86d32bf26d4cb2a96556a6f",
                            "lessThan": "93b49239840b91313adbd77b8b52993eff2d08c1",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "86c49119f0353f857cc08030ec9e4ebaab3d5a64",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "5.10.261",
                            "lessThan": "5.11",
                            "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/ipv6/mcast.c"
                    ],
                    "versions": [
                        {
                            "version": "5.13",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "5.13",
                            "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": "5.13",
                                    "versionEndExcluding": "6.6.158"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.13",
                                    "versionEndExcluding": "6.12.111"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.13",
                                    "versionEndExcluding": "6.18.53"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.13",
                                    "versionEndExcluding": "7.2.7"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.13",
                                    "versionEndExcluding": "7.3"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.10.261"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/c3343cd7ec8706c221e52b782f386b9af14a928a"
                },
                {
                    "url": "https://git.kernel.org/stable/c/4352737297b262e8367675c19a7dc6a9f53c97af"
                },
                {
                    "url": "https://git.kernel.org/stable/c/8d4fe5c13f5056faa6deb09a90e24a89f9ebfad4"
                },
                {
                    "url": "https://git.kernel.org/stable/c/5149c60c406595b56fda0c6e9aae7fd287f636aa"
                },
                {
                    "url": "https://git.kernel.org/stable/c/93b49239840b91313adbd77b8b52993eff2d08c1"
                }
            ],
            "title": "ipv6: mcast: fix RCU list diversion in ip6_mc_del1_src()",
            "x_generator": {
                "engine": "bippy-1.2.0"
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        }
    }
}