{"id":"CVE-2026-90279","revision":"57e07fa3e6fc4ca99ac15151b2a72ff0","records":[{"revision":"57e07fa3e6fc4ca99ac15151b2a72ff0","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-90279","aliases":[],"title":"md/raid5: round bitmap stripes with sector division","description":"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).","state":0,"publishedAt":"2026-09-17T16:08:10.654+00:00","modifiedAt":"2026-10-19T09:00:57.773+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"drivers/md/raid5.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"b29e6400be51c214a0ad30dce937348b57abe33a\",\n                            \"lessThan\": \"9d7490007707f90691911385365bd1d691d99225\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"aa8e15d69f5c0044d5bff61844e163aacc4ac172\",\n                            \"lessThan\": \"cab7d949b18b2f1cd625689dc16c5f81236bac93\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"9c89f604476cf15c31fbbdb043cff7fbf1dbe0cb\",\n                            \"lessThan\": \"02c10581866d08822c6348e299881485fc546185\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"9c89f604476cf15c31fbbdb043cff7fbf1dbe0cb\",\n                            \"lessThan\": \"ccbdc483eb041eef809e9ff223d1ad63518a2c52\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"9c89f604476cf15c31fbbdb043cff7fbf1dbe0cb\",\n                            \"lessThan\": \"17ea021ae74987d6064c8195c4922fa025753892\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"a41a0df5d7638acf15e723ad985980b4f7ff9383\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"6.6.79\",\n                            \"lessThan\": \"6.6.157\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.13\",\n                            \"lessThan\": \"6.12.110\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.13.2\",\n                            \"lessThan\": \"6.14\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"affected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"drivers/md/raid5.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"6.14\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"6.14\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.157\",\n                            \"lessThanOrEqual\": \"6.6.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.110\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.52\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.2.6\",\n                            \"lessThanOrEqual\": \"7.2.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.3\",\n                            \"lessThanOrEqual\": \"*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"original_commit_for_fix\"\n                        }\n                    ]\n                }"}],"metrics":[],"references":["https://git.kernel.org/stable/c/9d7490007707f90691911385365bd1d691d99225","https://git.kernel.org/stable/c/cab7d949b18b2f1cd625689dc16c5f81236bac93","https://git.kernel.org/stable/c/02c10581866d08822c6348e299881485fc546185","https://git.kernel.org/stable/c/ccbdc483eb041eef809e9ff223d1ad63518a2c52","https://git.kernel.org/stable/c/17ea021ae74987d6064c8195c4922fa025753892"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-90279","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-90279","identifiers":["CVE-2026-90279"]},"retained":false,"historicalAffected":[]}],"coverage":[]}