md/raid5: round bitmap stripes with sector division
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).
CVE-2026-90279
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-90279
Linux
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Linux
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "b29e6400be51c214a0ad30dce937348b57abe33a",
"lessThan": "9d7490007707f90691911385365bd1d691d99225",
"versionType": "git"
},
{
"status": "affected",
"version": "aa8e15d69f5c0044d5bff61844e163aacc4ac172",
"lessThan": "cab7d949b18b2f1cd625689dc16c5f81236bac93",
"versionType": "git"
},
{
"status": "affected",
"version": "9c89f604476cf15c31fbbdb043cff7fbf1dbe0cb",
"lessThan": "02c10581866d08822c6348e299881485fc546185",
"versionType": "git"
},
{
"status": "affected",
"version": "9c89f604476cf15c31fbbdb043cff7fbf1dbe0cb",
"lessThan": "ccbdc483eb041eef809e9ff223d1ad63518a2c52",
"versionType": "git"
},
{
"status": "affected",
"version": "9c89f604476cf15c31fbbdb043cff7fbf1dbe0cb",
"lessThan": "17ea021ae74987d6064c8195c4922fa025753892",
"versionType": "git"
},
{
"status": "affected",
"version": "a41a0df5d7638acf15e723ad985980b4f7ff9383",
"versionType": "git"
},
{
"status": "affected",
"version": "6.6.79",
"lessThan": "6.6.157",
"versionType": "semver"
},
{
"status": "affected",
"version": "6.12.13",
"lessThan": "6.12.110",
"versionType": "semver"
},
{
"status": "affected",
"version": "6.13.2",
"lessThan": "6.14",
"versionType": "semver"
}
],
"programFiles": [
"drivers/md/raid5.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "6.14"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "6.14",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.6.157",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.110",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.52",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.2.6",
"versionType": "semver",
"lessThanOrEqual": "7.2.*"
},
{
"status": "unaffected",
"version": "7.3",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"drivers/md/raid5.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-90279
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #36637 · Revision 1
- Added to Heist Feed
- Publisher date