{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-90279",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-09-11T19:38:34.797Z",
        "datePublished": "2026-09-17T16:08:10.654Z",
        "dateUpdated": "2026-10-19T09:00:57.773Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-10-19T09:00:57.773Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmd/raid5: round bitmap stripes with sector division\n\nraid5_bitmap_sector_map() aligns the array range to full RAID5 stripe\nwidths before converting it to component sectors. That width is\nchunk_sectors multiplied by the number of data disks, and it is not\nalways a power of two.\n\nReproduce with a 4-disk RAID5, 1024-sector chunks, and three data disks.\nThe full-stripe width is 3072 sectors. For a one-sector write at array\nsector 3072, correct rounding gives array range [3072, 6144), which maps\nto component range [1024, 2048). The old round_down()/round_up() logic\ninstead gives [1024, 4096), which maps to [0, 1024).\n\nUse sector_div() based arithmetic so the rounded range is aligned to the\nactual RAID5 stripe width.\n\nThe deterministic mapper test now reports the fixed component range as\n[1024, 2048), while the old mask-based range was [0, 1024)."
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "drivers/md/raid5.c"
                    ],
                    "versions": [
                        {
                            "version": "b29e6400be51c214a0ad30dce937348b57abe33a",
                            "lessThan": "9d7490007707f90691911385365bd1d691d99225",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "aa8e15d69f5c0044d5bff61844e163aacc4ac172",
                            "lessThan": "cab7d949b18b2f1cd625689dc16c5f81236bac93",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "9c89f604476cf15c31fbbdb043cff7fbf1dbe0cb",
                            "lessThan": "02c10581866d08822c6348e299881485fc546185",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "9c89f604476cf15c31fbbdb043cff7fbf1dbe0cb",
                            "lessThan": "ccbdc483eb041eef809e9ff223d1ad63518a2c52",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "9c89f604476cf15c31fbbdb043cff7fbf1dbe0cb",
                            "lessThan": "17ea021ae74987d6064c8195c4922fa025753892",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "a41a0df5d7638acf15e723ad985980b4f7ff9383",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "6.6.79",
                            "lessThan": "6.6.157",
                            "status": "affected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.12.13",
                            "lessThan": "6.12.110",
                            "status": "affected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.13.2",
                            "lessThan": "6.14",
                            "status": "affected",
                            "versionType": "semver"
                        }
                    ]
                },
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "affected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "drivers/md/raid5.c"
                    ],
                    "versions": [
                        {
                            "version": "6.14",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "6.14",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.6.157",
                            "lessThanOrEqual": "6.6.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.12.110",
                            "lessThanOrEqual": "6.12.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18.52",
                            "lessThanOrEqual": "6.18.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.2.6",
                            "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": "6.6.79",
                                    "versionEndExcluding": "6.6.157"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.12.13",
                                    "versionEndExcluding": "6.12.110"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.14",
                                    "versionEndExcluding": "6.18.52"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.14",
                                    "versionEndExcluding": "7.2.6"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.14",
                                    "versionEndExcluding": "7.3"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.13.2"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/9d7490007707f90691911385365bd1d691d99225"
                },
                {
                    "url": "https://git.kernel.org/stable/c/cab7d949b18b2f1cd625689dc16c5f81236bac93"
                },
                {
                    "url": "https://git.kernel.org/stable/c/02c10581866d08822c6348e299881485fc546185"
                },
                {
                    "url": "https://git.kernel.org/stable/c/ccbdc483eb041eef809e9ff223d1ad63518a2c52"
                },
                {
                    "url": "https://git.kernel.org/stable/c/17ea021ae74987d6064c8195c4922fa025753892"
                }
            ],
            "title": "md/raid5: round bitmap stripes with sector division",
            "x_generator": {
                "engine": "bippy-1.2.0"
            }
        }
    }
}