{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-98223",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-09-25T10:25:14.327Z",
        "datePublished": "2026-10-06T08:44:58.472Z",
        "dateUpdated": "2026-10-19T09:15:55.143Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-10-19T09:15:55.143Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmm: filemap: retain mapped dropbehind folios\n\nFault-around can map ready dropbehind folios without going through the\nnormal page-cache lookup that clears dropbehind.  A mapping represents a\ncompeting cached user, so retain the folio instead of forcibly unmapping\nit when writeback completes.\n\nFor a mapped folio, folio_unmap_invalidate() can call\nunmap_mapping_folio(), which takes i_mmap_rwsem and may sleep.  Retaining\nmapped folios avoids this path when folio_end_dropbehind() runs in\nnon-preemptible task context.\n\nTal was able to trigger a sleeping-in-atomic warning due to this [1].\n\nUnmapped dropbehind folios continue through the existing invalidation path."
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "mm/filemap.c"
                    ],
                    "versions": [
                        {
                            "version": "fb7d3bc4149395c1ae99029c852eab6c28fc3c88",
                            "lessThan": "2897601dffe576fcd87a4259102f41f7fb0cbfc8",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "fb7d3bc4149395c1ae99029c852eab6c28fc3c88",
                            "lessThan": "77c0fade37c80e8aa16ac048a9828249055e3f66",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "fb7d3bc4149395c1ae99029c852eab6c28fc3c88",
                            "lessThan": "848d2ce2fce15fbdc083fbf9691bfa72911033c4",
                            "status": "affected",
                            "versionType": "git"
                        }
                    ]
                },
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "affected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "mm/filemap.c"
                    ],
                    "versions": [
                        {
                            "version": "6.14",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "6.14",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18.54",
                            "lessThanOrEqual": "6.18.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.2.8",
                            "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": "6.14",
                                    "versionEndExcluding": "6.18.54"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.14",
                                    "versionEndExcluding": "7.2.8"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.14",
                                    "versionEndExcluding": "7.3"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/2897601dffe576fcd87a4259102f41f7fb0cbfc8"
                },
                {
                    "url": "https://git.kernel.org/stable/c/77c0fade37c80e8aa16ac048a9828249055e3f66"
                },
                {
                    "url": "https://git.kernel.org/stable/c/848d2ce2fce15fbdc083fbf9691bfa72911033c4"
                }
            ],
            "title": "mm: filemap: retain mapped dropbehind folios",
            "x_generator": {
                "engine": "bippy-1.2.0"
            }
        }
    }
}