{"api_version":"1","generated_at":"2026-09-25T07:55:08+00:00","cve":"CVE-2026-90279","urls":{"html":"https://cve.report/CVE-2026-90279","api":"https://cve.report/api/cve/CVE-2026-90279.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-90279","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-90279"},"summary":{"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":"PUBLISHED","assigner":"Linux","published_at":"2026-09-17 17:17:24","updated_at":"2026-09-17 17:17:24"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/17ea021ae74987d6064c8195c4922fa025753892","name":"https://git.kernel.org/stable/c/17ea021ae74987d6064c8195c4922fa025753892","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/ccbdc483eb041eef809e9ff223d1ad63518a2c52","name":"https://git.kernel.org/stable/c/ccbdc483eb041eef809e9ff223d1ad63518a2c52","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/cab7d949b18b2f1cd625689dc16c5f81236bac93","name":"https://git.kernel.org/stable/c/cab7d949b18b2f1cd625689dc16c5f81236bac93","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/02c10581866d08822c6348e299881485fc546185","name":"https://git.kernel.org/stable/c/02c10581866d08822c6348e299881485fc546185","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/9d7490007707f90691911385365bd1d691d99225","name":"https://git.kernel.org/stable/c/9d7490007707f90691911385365bd1d691d99225","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-90279","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-90279","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected b29e6400be51c214a0ad30dce937348b57abe33a 9d7490007707f90691911385365bd1d691d99225 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected aa8e15d69f5c0044d5bff61844e163aacc4ac172 cab7d949b18b2f1cd625689dc16c5f81236bac93 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 9c89f604476cf15c31fbbdb043cff7fbf1dbe0cb 02c10581866d08822c6348e299881485fc546185 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 9c89f604476cf15c31fbbdb043cff7fbf1dbe0cb ccbdc483eb041eef809e9ff223d1ad63518a2c52 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 9c89f604476cf15c31fbbdb043cff7fbf1dbe0cb 17ea021ae74987d6064c8195c4922fa025753892 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected a41a0df5d7638acf15e723ad985980b4f7ff9383 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.6.79 6.6.157 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.12.13 6.12.110 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.13.2 6.14 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.14","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.14 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.6.157 6.6.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.110 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.52 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2.6 7.2.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.3-rc1 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["drivers/md/raid5.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"9d7490007707f90691911385365bd1d691d99225","status":"affected","version":"b29e6400be51c214a0ad30dce937348b57abe33a","versionType":"git"},{"lessThan":"cab7d949b18b2f1cd625689dc16c5f81236bac93","status":"affected","version":"aa8e15d69f5c0044d5bff61844e163aacc4ac172","versionType":"git"},{"lessThan":"02c10581866d08822c6348e299881485fc546185","status":"affected","version":"9c89f604476cf15c31fbbdb043cff7fbf1dbe0cb","versionType":"git"},{"lessThan":"ccbdc483eb041eef809e9ff223d1ad63518a2c52","status":"affected","version":"9c89f604476cf15c31fbbdb043cff7fbf1dbe0cb","versionType":"git"},{"lessThan":"17ea021ae74987d6064c8195c4922fa025753892","status":"affected","version":"9c89f604476cf15c31fbbdb043cff7fbf1dbe0cb","versionType":"git"},{"status":"affected","version":"a41a0df5d7638acf15e723ad985980b4f7ff9383","versionType":"git"},{"lessThan":"6.6.157","status":"affected","version":"6.6.79","versionType":"semver"},{"lessThan":"6.12.110","status":"affected","version":"6.12.13","versionType":"semver"},{"lessThan":"6.14","status":"affected","version":"6.13.2","versionType":"semver"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["drivers/md/raid5.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"6.14"},{"lessThan":"6.14","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.157","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.110","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.52","versionType":"semver"},{"lessThanOrEqual":"7.2.*","status":"unaffected","version":"7.2.6","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.3-rc1","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.157","versionStartIncluding":"6.6.79","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.110","versionStartIncluding":"6.12.13","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.52","versionStartIncluding":"6.14","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2.6","versionStartIncluding":"6.14","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.3-rc1","versionStartIncluding":"6.14","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.13.2","vulnerable":true}],"negate":false,"operator":"OR"}]}],"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)."}],"providerMetadata":{"dateUpdated":"2026-09-17T16:08:10.654Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"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"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-90279","datePublished":"2026-09-17T16:08:10.654Z","dateReserved":"2026-09-11T19:38:34.797Z","dateUpdated":"2026-09-17T16:08:10.654Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-09-17 17:17:24","lastModifiedDate":"2026-09-17 17:17:24","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"90279","Ordinal":"1","Title":"md/raid5: round bitmap stripes with sector division","CVE":"CVE-2026-90279","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"90279","Ordinal":"1","NoteData":"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).","Type":"Description","Title":"md/raid5: round bitmap stripes with sector division"}]}}}