CVE-2024-47660 (GCVE-0-2024-47660)

Vulnerability from cvelistv5 – Published: 2024-10-09 14:02 – Updated: 2026-05-12 11:58
VLAI
Title
fsnotify: clear PARENT_WATCHED flags lazily
Summary
In the Linux kernel, the following vulnerability has been resolved: fsnotify: clear PARENT_WATCHED flags lazily In some setups directories can have many (usually negative) dentries. Hence __fsnotify_update_child_dentry_flags() function can take a significant amount of time. Since the bulk of this function happens under inode->i_lock this causes a significant contention on the lock when we remove the watch from the directory as the __fsnotify_update_child_dentry_flags() call from fsnotify_recalc_mask() races with __fsnotify_update_child_dentry_flags() calls from __fsnotify_parent() happening on children. This can lead upto softlockup reports reported by users. Fix the problem by calling fsnotify_update_children_dentry_flags() to set PARENT_WATCHED flags only when parent starts watching children. When parent stops watching children, clear false positive PARENT_WATCHED flags lazily in __fsnotify_parent() for each accessed child.
Severity
No CVSS data available.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-10-10 13:23 UTC
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 873feea09ebc980cbd3631b767356ce1eee65ec1 , < 3f3ef1d9f66b93913ce2171120d9226b55acd41d (git)
Affected: 873feea09ebc980cbd3631b767356ce1eee65ec1 , < f9a48bc3dd9099935751458a5bbbea4b7c28abc8 (git)
Affected: 873feea09ebc980cbd3631b767356ce1eee65ec1 , < d8c42405fc3507cc43ba7e4986a773c3fc633f6e (git)
Affected: 873feea09ebc980cbd3631b767356ce1eee65ec1 , < fc1b1e135c3f72382f792e6c319fc088d5523ad5 (git)
Affected: 873feea09ebc980cbd3631b767356ce1eee65ec1 , < 7ef1d2e240c32b1f337a37232d037b07e3919e1a (git)
Affected: 873feea09ebc980cbd3631b767356ce1eee65ec1 , < 172e422ffea20a89bfdc672741c1aad6fbb5044e (git)
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Linux Linux Affected: 2.6.38
Unaffected: 0 , < 2.6.38 (semver)
Unaffected: 5.10.226 , ≤ 5.10.* (semver)
Unaffected: 5.15.167 , ≤ 5.15.* (semver)
Unaffected: 6.1.109 , ≤ 6.1.* (semver)
Unaffected: 6.6.50 , ≤ 6.6.* (semver)
Unaffected: 6.10.9 , ≤ 6.10.* (semver)
Unaffected: 6.11 , ≤ * (original_commit_for_fix)
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Siemens RUGGEDCOM RST2428P Affected: 0 , < V3.2 (custom)
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Siemens SCALANCE XC-300/XR-300/XC-400/XR-500WG/XR-500 family Affected: 0 , < V3.2 (custom)
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Siemens SCALANCE XCM-/XRM-/XCH-/XRH-300 family Affected: 0 , < V3.2 (custom)
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Siemens SIMATIC S7-1500 TM MFP - GNU/Linux subsystem Affected: 0 , < * (custom)
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}



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Tags
Taxonomy of the tags.





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

Author Source Type Date Other

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.


Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.