md: remove REQ_NOWAIT support from raid1/10/456
In the Linux kernel, the following vulnerability has been resolved: md: remove REQ_NOWAIT support from raid1/10/456 REQ_NOWAIT support in md personalities that can block internally is fundamentally incomplete. While reads can avoid some blocking paths, write requests can still encounter cases where one mirror succeeds while another returns -EAGAIN. At that point md cannot distinguish queue pressure from a real device failure, so it can neither record a bad block nor safely retry the write without REQ_NOWAIT, leaving mirrors with divergent data. Rather than continue advertising REQ_NOWAIT support for personalities that cannot implement it correctly, remove it from raid1, raid10 and raid456. Keep REQ_NOWAIT for linear and raid0, which only remap bios to their underlying devices; stacked limits will still clear the feature if any component device lacks REQ_NOWAIT support.
CVE-2026-90401
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-2026-90401
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": "f51d46d0e7cb5b8494aa534d276a9d8915a2443d",
"lessThan": "ffcc9ea4e4d121c78aef6654a1577aa7d120774d",
"versionType": "git"
},
{
"status": "affected",
"version": "f51d46d0e7cb5b8494aa534d276a9d8915a2443d",
"lessThan": "9bb9504e2d8f3d22ef12d51c333dd499f402dc8f",
"versionType": "git"
},
{
"status": "affected",
"version": "f51d46d0e7cb5b8494aa534d276a9d8915a2443d",
"lessThan": "3fe5b7c9fb72ccc29bfd0f955b124892af7e3674",
"versionType": "git"
},
{
"status": "affected",
"version": "39db562b3fedb93978a7e42dd216b306740959f8",
"versionType": "git"
},
{
"status": "affected",
"version": "5.15.111",
"lessThan": "5.16",
"versionType": "semver"
}
],
"programFiles": [
"drivers/md/md-bitmap.c",
"drivers/md/md-bitmap.h",
"drivers/md/md-linear.c",
"drivers/md/md-llbitmap.c",
"drivers/md/md.c",
"drivers/md/raid0.c",
"drivers/md/raid1-10.c",
"drivers/md/raid1.c",
"drivers/md/raid10.c",
"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": "5.17"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "5.17",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.18.57",
"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/md-bitmap.c",
"drivers/md/md-bitmap.h",
"drivers/md/md-linear.c",
"drivers/md/md-llbitmap.c",
"drivers/md/md.c",
"drivers/md/raid0.c",
"drivers/md/raid1-10.c",
"drivers/md/raid1.c",
"drivers/md/raid10.c",
"drivers/md/raid5.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-90401
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #36723 · Revision 1
- Added to Heist Feed
- Publisher date