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CVE-2026-72176 (GCVE-0-2026-72176)

Vulnerability from cvelistv5 – Published: 2026-08-15 05:53 – Updated: 2026-08-17 05:09
VLAI
Title
mm/damon/sysfs-schemes: put stats for scheme_add_dirs() internal error
Summary
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.
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 5181b75f438d2e5b7f27bf48c6ea88a87c2882b7 , < 50a753171d255895e5dd41566986b48dcec06f31 (git)
Affected: 5181b75f438d2e5b7f27bf48c6ea88a87c2882b7 , < f63d6e5ba72aeacdee4fddc902bd7616cd62b919 (git)
Affected: 5181b75f438d2e5b7f27bf48c6ea88a87c2882b7 , < 40a04601a3f66cabd6629c258a07af645a658865 (git)
Affected: 5181b75f438d2e5b7f27bf48c6ea88a87c2882b7 , < 6b6b5d7c2c957136b92c00b77b7175259f13082b (git)
Affected: 5181b75f438d2e5b7f27bf48c6ea88a87c2882b7 , < 05ea83ee88ca70f8932906d9f2617ff996f45b50 (git)
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Linux Linux Affected: 6.2
Unaffected: 0 , < 6.2 (semver)
Unaffected: 6.6.145 , ≤ 6.6.* (semver)
Unaffected: 6.12.97 , ≤ 6.12.* (semver)
Unaffected: 6.18.40 , ≤ 6.18.* (semver)
Unaffected: 7.1.5 , ≤ 7.1.* (semver)
Unaffected: 7.2 , ≤ * (original_commit_for_fix)
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    "datePublished": "2026-08-15T05:53:40.759Z",
    "dateReserved": "2026-08-09T03:40:39.910Z",
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    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-08-18T15:20:13+00:00",
      "cve": "CVE-2026-72176",
      "id": "CVE-2026-72176",
      "initial_release_date": "2026-08-15T00:00:00+00:00",
      "product_status:known_affected": "184",
      "product_status:known_not_affected": "90",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: mm/damon/sysfs-schemes: put stats for scheme_add_dirs() internal error",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-72176.json",
      "version": "3"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.