CVE-2024-38580 (GCVE-0-2024-38580)

Vulnerability from cvelistv5 – Published: 2024-06-19 13:37 – Updated: 2026-05-11 20:19
VLAI
Title
epoll: be better about file lifetimes
Summary
In the Linux kernel, the following vulnerability has been resolved: epoll: be better about file lifetimes epoll can call out to vfs_poll() with a file pointer that may race with the last 'fput()'. That would make f_count go down to zero, and while the ep->mtx locking means that the resulting file pointer tear-down will be blocked until the poll returns, it means that f_count is already dead, and any use of it won't actually get a reference to the file any more: it's dead regardless. Make sure we have a valid ref on the file pointer before we call down to vfs_poll() from the epoll routines.
Severity
No CVSS data available.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < cbfd1088e24ec4c1199756a37cb8e4cd0a4b016e (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 559214eb4e5c3d05e69428af2fae2691ba1eb784 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 4f65f4defe4e23659275ce5153541cd4f76ce2d2 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 16e3182f6322575eb7c12e728ad3c7986a189d5d (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 4efaa5acf0a1d2b5947f98abb3acf8bfd966422b (git)
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Linux Linux Affected: 2.6.12
Unaffected: 0 , < 2.6.12 (semver)
Unaffected: 5.15.161 , ≤ 5.15.* (semver)
Unaffected: 6.1.93 , ≤ 6.1.* (semver)
Unaffected: 6.6.33 , ≤ 6.6.* (semver)
Unaffected: 6.8.12 , ≤ 6.8.* (semver)
Unaffected: 6.9 , ≤ * (original_commit_for_fix)
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      "dataType": "CVE_RECORD",
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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.