cxl/region: Resolve region deletion races
In the Linux kernel, the following vulnerability has been resolved: cxl/region: Resolve region deletion races Sungwoo noticed that the sysfs trigger to delete a region may try to delete a region multiple times. It also has no exclusion relative to the kernel releasing the region via CXL root device teardown. Instead of installing new cxl root devres actions per region, use the existing root decoder unregistration event to remove all remaining regions. An xarray of regions replaces a devres list of regions. This handles 3 separate issues with the old approach: 1/ sysfs users racing to delete the same region: no longer possible now that the regions_lock is held over the lookup and deletion. 2/ multiple actions triggering deletion of the same region: solved by erasing regions while holding @regions_lock, and only proceeding on successful erasure. 3/ userspace racing devres_release_all() to trigger the devres not found warning: solved by sysfs unregistration not requiring a release action
CVE-2026-74272
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-2026-74272
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": "779dd20cfb56c510f89877cca45529fa9f8bc450",
"lessThan": "441250eea84608c6c2dbd7f00c61df32836ac97d",
"versionType": "git"
},
{
"status": "affected",
"version": "779dd20cfb56c510f89877cca45529fa9f8bc450",
"lessThan": "c478810c4ce7216261fc1b6ca5180adcda26b1a1",
"versionType": "git"
},
{
"status": "affected",
"version": "779dd20cfb56c510f89877cca45529fa9f8bc450",
"lessThan": "be44c1c04f85d7b7ac1c597a30b443bbd346acbd",
"versionType": "git"
},
{
"status": "affected",
"version": "779dd20cfb56c510f89877cca45529fa9f8bc450",
"lessThan": "4dd86ca99ffcc413cbf79063fd9956ef54e0ca91",
"versionType": "git"
}
],
"programFiles": [
"drivers/cxl/core/core.h",
"drivers/cxl/core/port.c",
"drivers/cxl/core/region.c",
"drivers/cxl/cxl.h"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "6.0"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "6.0",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.6.160",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.114",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "7.1.5",
"versionType": "semver",
"lessThanOrEqual": "7.1.*"
},
{
"status": "unaffected",
"version": "7.2",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"drivers/cxl/core/core.h",
"drivers/cxl/core/port.c",
"drivers/cxl/core/region.c",
"drivers/cxl/cxl.h"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-74272
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #46538 · Revision 1
- Added to Heist Feed
- Publisher date