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

Vulnerability from cvelistv5 – Published: 2024-05-17 12:24 – Updated: 2025-05-04 09:05
VLAI?
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
References
Impacted products
Vendor Product Version
Linux Linux Affected: 8c88a474357ead632b07c70bf7f119ace8c3b39e , < e88b5ae01901c4a655a53158397746334778a57b (git)
Affected: 8c88a474357ead632b07c70bf7f119ace8c3b39e , < 3d08cca5fd0aabb62b7015067ab40913b33da906 (git)
Affected: 8c88a474357ead632b07c70bf7f119ace8c3b39e , < 952c3fce297f12c7ff59380adb66b564e2bc9b64 (git)
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    Linux 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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  • 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.
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  • 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.



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