github - ghsa-pv8w-5hmg-8mf4

GHSA-PV8W-5HMG-8MF4

Vulnerability from github – Published: 2024-05-17 15:31 – Updated: 2025-09-26 18:31

Details

In the Linux kernel, the following vulnerability has been resolved:

debugfs: fix wait/cancellation handling during remove

Ben Greear further reports deadlocks during concurrent debugfs remove while files are being accessed, even though the code in question now uses debugfs cancellations. Turns out that despite all the review on the locking, we missed completely that the logic is wrong: if the refcount hits zero we can finish (and need not wait for the completion), but if it doesn't we have to trigger all the cancellations. As written, we can never get into the loop triggering the cancellations. Fix this, and explain it better while at it.

Severity ?

5.5 (Medium)


                  
                    CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

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  "affected": [],
  "aliases": [
    "CVE-2024-35793"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-667"
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    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2024-05-17T13:15:59Z",
    "severity": "MODERATE"
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  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\ndebugfs: fix wait/cancellation handling during remove\n\nBen Greear further reports deadlocks during concurrent debugfs\nremove while files are being accessed, even though the code in\nquestion now uses debugfs cancellations. Turns out that despite\nall the review on the locking, we missed completely that the\nlogic is wrong: if the refcount hits zero we can finish (and\nneed not wait for the completion), but if it doesn\u0027t we have\nto trigger all the cancellations. As written, we can _never_\nget into the loop triggering the cancellations. Fix this, and\nexplain it better while at it.",
  "id": "GHSA-pv8w-5hmg-8mf4",
  "modified": "2025-09-26T18:31:17Z",
  "published": "2024-05-17T15:31:08Z",
  "references": [
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      "type": "CVSS_V3"
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}

CVE-2024-35793 (GCVE-0-2024-35793)

Vulnerability from cvelistv5 – Published: 2024-05-17 12:24 – Updated: 2025-05-04 09:05

Summary

In the Linux kernel, the following vulnerability has been resolved: debugfs: fix wait/cancellation handling during remove Ben Greear further reports deadlocks during concurrent debugfs remove while files are being accessed, even though the code in question now uses debugfs cancellations. Turns out that despite all the review on the locking, we missed completely that the logic is wrong: if the refcount hits zero we can finish (and need not wait for the completion), but if it doesn't we have to trigger all the cancellations. As written, we can _never_ get into the loop triggering the cancellations. Fix this, and explain it better while at it.

Severity ?

No CVSS data available.

Assigner

Linux

References

URL

Tags

	https://git.kernel.org/stable/c/e88b5ae01901c4a65…
	https://git.kernel.org/stable/c/3d08cca5fd0aabb62…
	https://git.kernel.org/stable/c/952c3fce297f12c7f…

Impacted products

Vendor

Product

Version

Linux

Affected: 8c88a474357ead632b07c70bf7f119ace8c3b39e , < e88b5ae01901c4a655a53158397746334778a57b (git)
Affected: 8c88a474357ead632b07c70bf7f119ace8c3b39e , < 3d08cca5fd0aabb62b7015067ab40913b33da906 (git)
Affected: 8c88a474357ead632b07c70bf7f119ace8c3b39e , < 952c3fce297f12c7ff59380adb66b564e2bc9b64 (git)

Linux

Affected: 6.7
Unaffected: 0 , < 6.7 (semver)
Unaffected: 6.7.12 , ≤ 6.7.* (semver)
Unaffected: 6.8.3 , ≤ 6.8.* (semver)
Unaffected: 6.9 , ≤ * (original_commit_for_fix)

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Sightings

Author	Source	Type	Date

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.

Action not permitted

GHSA-PV8W-5HMG-8MF4

CVE-2024-35793 (GCVE-0-2024-35793)

Tags

Sightings

Nomenclature