md/raid5: round bitmap stripes with sector division
Summary
| CVE | CVE-2026-90279 |
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| State | PUBLISHED |
|---|
| Assigner | Linux |
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| Source Priority | CVE Program / NVD first with legacy fallback |
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| Published | 2026-09-17 17:17:24 UTC |
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| Updated | 2026-09-17 17:17:24 UTC |
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| Description | In the Linux kernel, the following vulnerability has been resolved:
md/raid5: round bitmap stripes with sector division
raid5_bitmap_sector_map() aligns the array range to full RAID5 stripe
widths before converting it to component sectors. That width is
chunk_sectors multiplied by the number of data disks, and it is not
always a power of two.
Reproduce with a 4-disk RAID5, 1024-sector chunks, and three data disks.
The full-stripe width is 3072 sectors. For a one-sector write at array
sector 3072, correct rounding gives array range [3072, 6144), which maps
to component range [1024, 2048). The old round_down()/round_up() logic
instead gives [1024, 4096), which maps to [0, 1024).
Use sector_div() based arithmetic so the rounded range is aligned to the
actual RAID5 stripe width.
The deterministic mapper test now reports the fixed component range as
[1024, 2048), while the old mask-based range was [0, 1024). |
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Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|
| CNA |
Linux |
Linux |
affected b29e6400be51c214a0ad30dce937348b57abe33a 9d7490007707f90691911385365bd1d691d99225 git |
Not specified |
| CNA |
Linux |
Linux |
affected aa8e15d69f5c0044d5bff61844e163aacc4ac172 cab7d949b18b2f1cd625689dc16c5f81236bac93 git |
Not specified |
| CNA |
Linux |
Linux |
affected 9c89f604476cf15c31fbbdb043cff7fbf1dbe0cb 02c10581866d08822c6348e299881485fc546185 git |
Not specified |
| CNA |
Linux |
Linux |
affected 9c89f604476cf15c31fbbdb043cff7fbf1dbe0cb ccbdc483eb041eef809e9ff223d1ad63518a2c52 git |
Not specified |
| CNA |
Linux |
Linux |
affected 9c89f604476cf15c31fbbdb043cff7fbf1dbe0cb 17ea021ae74987d6064c8195c4922fa025753892 git |
Not specified |
| CNA |
Linux |
Linux |
affected a41a0df5d7638acf15e723ad985980b4f7ff9383 git |
Not specified |
| CNA |
Linux |
Linux |
affected 6.6.79 6.6.157 semver |
Not specified |
| CNA |
Linux |
Linux |
affected 6.12.13 6.12.110 semver |
Not specified |
| CNA |
Linux |
Linux |
affected 6.13.2 6.14 semver |
Not specified |
| CNA |
Linux |
Linux |
affected 6.14 |
Not specified |
| CNA |
Linux |
Linux |
unaffected 6.14 semver |
Not specified |
| CNA |
Linux |
Linux |
unaffected 6.6.157 6.6.* semver |
Not specified |
| CNA |
Linux |
Linux |
unaffected 6.12.110 6.12.* semver |
Not specified |
| CNA |
Linux |
Linux |
unaffected 6.18.52 6.18.* semver |
Not specified |
| CNA |
Linux |
Linux |
unaffected 7.2.6 7.2.* semver |
Not specified |
| CNA |
Linux |
Linux |
unaffected 7.3-rc1 * original_commit_for_fix |
Not specified |
References
| Reference | Source | Link | Tags |
|---|
| git.kernel.org/stable/c/17ea021ae74987d6064c8195c4922fa025753892 |
416baaa9-dc9f-4396-8d5f-8c081fb06d67 |
git.kernel.org |
|
| git.kernel.org/stable/c/ccbdc483eb041eef809e9ff223d1ad63518a2c52 |
416baaa9-dc9f-4396-8d5f-8c081fb06d67 |
git.kernel.org |
|
| git.kernel.org/stable/c/cab7d949b18b2f1cd625689dc16c5f81236bac93 |
416baaa9-dc9f-4396-8d5f-8c081fb06d67 |
git.kernel.org |
|
| git.kernel.org/stable/c/02c10581866d08822c6348e299881485fc546185 |
416baaa9-dc9f-4396-8d5f-8c081fb06d67 |
git.kernel.org |
|
| git.kernel.org/stable/c/9d7490007707f90691911385365bd1d691d99225 |
416baaa9-dc9f-4396-8d5f-8c081fb06d67 |
git.kernel.org |
|
| CVE Program record |
CVE.ORG |
www.cve.org |
canonical |
| NVD vulnerability detail |
NVD |
nvd.nist.gov |
canonical, analysis |
No vendor comments have been submitted for this CVE.
There are currently no legacy QID mappings associated with this CVE.