Description
In the Linux kernel, the following vulnerability has been resolved:
mm/damon/sysfs-schemes: put stats for scheme_add_dirs() internal error
damon_sysfs_scheme_add_dirs() setup the tried_regions directory after the
stats directory setup is completed. When the tried_regions directory
setup is failed, the setup function ensures the reference for the tried
regions directory is released. Hence the error path should put references
on setup succeeded directory objects, starting from the stats directory.
However, the error path is putting the tried_regions directory instead of
the stats directory.
As a direct result, the stats directory object is leaked. Worse yet, if
the tried_regions directory setup failed from the initial allocation, the
scheme->tried_regions field remains uninitialized. The following
kobject_put(&scheme->tried_regions->kobj) call in the error path will
dereference the uninitialized memory. The setup failures should not be
common. But once it happens, the consequence is quite bad.
Fix this issue by correctly putting the stats directory instead of the
tried_regions directory.
The issue was discovered [1] by Sashiko.
mm/damon/sysfs-schemes: put stats for scheme_add_dirs() internal error
damon_sysfs_scheme_add_dirs() setup the tried_regions directory after the
stats directory setup is completed. When the tried_regions directory
setup is failed, the setup function ensures the reference for the tried
regions directory is released. Hence the error path should put references
on setup succeeded directory objects, starting from the stats directory.
However, the error path is putting the tried_regions directory instead of
the stats directory.
As a direct result, the stats directory object is leaked. Worse yet, if
the tried_regions directory setup failed from the initial allocation, the
scheme->tried_regions field remains uninitialized. The following
kobject_put(&scheme->tried_regions->kobj) call in the error path will
dereference the uninitialized memory. The setup failures should not be
common. But once it happens, the consequence is quite bad.
Fix this issue by correctly putting the stats directory instead of the
tried_regions directory.
The issue was discovered [1] by Sashiko.
Published:
2026-08-15
Score:
n/a
EPSS:
n/a
KEV:
No
Impact:
n/a
Action:
n/a
Analysis
No analysis available yet.
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Linux | Linux | unaffected |
|
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| Linux | Linux | affected |
|
No data.
No data.
No data available yet.
Remediation
No remediation available yet.
Tracking
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Advisories
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References
History
Sat, 15 Aug 2026 06:00:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | In the Linux kernel, the following vulnerability has been resolved: mm/damon/sysfs-schemes: put stats for scheme_add_dirs() internal error damon_sysfs_scheme_add_dirs() setup the tried_regions directory after the stats directory setup is completed. When the tried_regions directory setup is failed, the setup function ensures the reference for the tried regions directory is released. Hence the error path should put references on setup succeeded directory objects, starting from the stats directory. However, the error path is putting the tried_regions directory instead of the stats directory. As a direct result, the stats directory object is leaked. Worse yet, if the tried_regions directory setup failed from the initial allocation, the scheme->tried_regions field remains uninitialized. The following kobject_put(&scheme->tried_regions->kobj) call in the error path will dereference the uninitialized memory. The setup failures should not be common. But once it happens, the consequence is quite bad. Fix this issue by correctly putting the stats directory instead of the tried_regions directory. The issue was discovered [1] by Sashiko. | |
| Title | mm/damon/sysfs-schemes: put stats for scheme_add_dirs() internal error | |
| First Time appeared |
Linux
Linux linux Kernel |
|
| CPEs | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | |
| Vendors & Products |
Linux
Linux linux Kernel |
|
| References |
|
|
MITRE
Status: PUBLISHED
Assigner: Linux
Published:
Updated: 2026-08-15T05:53:40.759Z
Reserved: 2026-08-09T03:40:39.910Z
Link: CVE-2026-72176
Vulnrichment
No data.
NVD
Status : Received
Published: 2026-08-15T06:21:35.810
Modified: 2026-08-15T06:21:35.810
Link: CVE-2026-72176
Redhat
No data.
OpenCVE Enrichment
No data.
Weaknesses
No weakness.