dax/fsdev: clear vmemmap_shift when binding static pgmap
In the Linux kernel, the following vulnerability has been resolved: dax/fsdev: clear vmemmap_shift when binding static pgmap Clear pgmap->vmemmap_shift for static DAX devices. When rebinding a static device from device_dax (which may set vmemmap_shift based on alignment) to fsdev_dax, the stale vmemmap_shift persists on the shared pgmap. Explicitly zero it before devm_memremap_pages() so the vmemmap is built for order-0 folios as fsdev requires.
CVE-2026-93076
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-2026-93076
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": "d5406bd458b0ac10b1301a4d5801d85c8f648637",
"lessThan": "d298a0513aaf7d48f2a9f4a90041de910750cfcf",
"versionType": "git"
},
{
"status": "affected",
"version": "d5406bd458b0ac10b1301a4d5801d85c8f648637",
"lessThan": "e0239229931faf9ca3367e3befcf16f77b2cd45b",
"versionType": "git"
}
],
"programFiles": [
"drivers/dax/fsdev.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "7.1"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "7.1",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "7.2.6",
"versionType": "semver",
"lessThanOrEqual": "7.2.*"
},
{
"status": "unaffected",
"version": "7.3",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"drivers/dax/fsdev.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-93076
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #37810 · Revision 1
- Added to Heist Feed
- Publisher date