mm/damon/sysfs-schemes: put stats for scheme_add_dirs() internal error

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-72176
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-15 06:21:35 UTC
Updated2026-08-17 06:18:18 UTC
DescriptionIn 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.

Risk And Classification

EPSS: 0.002000000 probability, percentile 0.101570000 (date 2026-08-17)

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 5181b75f438d2e5b7f27bf48c6ea88a87c2882b7 50a753171d255895e5dd41566986b48dcec06f31 git Not specified
CNA Linux Linux affected 5181b75f438d2e5b7f27bf48c6ea88a87c2882b7 f63d6e5ba72aeacdee4fddc902bd7616cd62b919 git Not specified
CNA Linux Linux affected 5181b75f438d2e5b7f27bf48c6ea88a87c2882b7 40a04601a3f66cabd6629c258a07af645a658865 git Not specified
CNA Linux Linux affected 5181b75f438d2e5b7f27bf48c6ea88a87c2882b7 6b6b5d7c2c957136b92c00b77b7175259f13082b git Not specified
CNA Linux Linux affected 5181b75f438d2e5b7f27bf48c6ea88a87c2882b7 05ea83ee88ca70f8932906d9f2617ff996f45b50 git Not specified
CNA Linux Linux affected 6.2 Not specified
CNA Linux Linux unaffected 6.2 semver Not specified
CNA Linux Linux unaffected 6.6.145 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.97 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.40 6.18.* semver Not specified
CNA Linux Linux unaffected 7.1.5 7.1.* semver Not specified
CNA Linux Linux unaffected 7.2 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/50a753171d255895e5dd41566986b48dcec06f31 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/f63d6e5ba72aeacdee4fddc902bd7616cd62b919 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/05ea83ee88ca70f8932906d9f2617ff996f45b50 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/40a04601a3f66cabd6629c258a07af645a658865 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/6b6b5d7c2c957136b92c00b77b7175259f13082b 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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