CVE-2023-53608 (GCVE-0-2023-53608)

Vulnerability from cvelistv5 – Published: 2025-10-04 15:44 – Updated: 2026-05-11 19:48
VLAI
Title
nilfs2: fix potential UAF of struct nilfs_sc_info in nilfs_segctor_thread()
Summary
In the Linux kernel, the following vulnerability has been resolved: nilfs2: fix potential UAF of struct nilfs_sc_info in nilfs_segctor_thread() The finalization of nilfs_segctor_thread() can race with nilfs_segctor_kill_thread() which terminates that thread, potentially causing a use-after-free BUG as KASAN detected. At the end of nilfs_segctor_thread(), it assigns NULL to "sc_task" member of "struct nilfs_sc_info" to indicate the thread has finished, and then notifies nilfs_segctor_kill_thread() of this using waitqueue "sc_wait_task" on the struct nilfs_sc_info. However, here, immediately after the NULL assignment to "sc_task", it is possible that nilfs_segctor_kill_thread() will detect it and return to continue the deallocation, freeing the nilfs_sc_info structure before the thread does the notification. This fixes the issue by protecting the NULL assignment to "sc_task" and its notification, with spinlock "sc_state_lock" of the struct nilfs_sc_info. Since nilfs_segctor_kill_thread() does a final check to see if "sc_task" is NULL with "sc_state_lock" locked, this can eliminate the race.
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 9ff05123e3bfbb1d2b68ba1d9bf1f7d1dffc1453 , < 034cce77d52ba013ce62b4f5258c29907eb1ada5 (git)
Affected: 9ff05123e3bfbb1d2b68ba1d9bf1f7d1dffc1453 , < 0dbf0e64b91ee8fcb278aea93eb06fc7d56ecbcc (git)
Affected: 9ff05123e3bfbb1d2b68ba1d9bf1f7d1dffc1453 , < 613bf23c070d11c525268f2945aa594704a9b764 (git)
Affected: 9ff05123e3bfbb1d2b68ba1d9bf1f7d1dffc1453 , < f32297dba338dc06d62286dedb3cdbd5175b1719 (git)
Affected: 9ff05123e3bfbb1d2b68ba1d9bf1f7d1dffc1453 , < 92684e02654c91a61a0b0561433b710bcece19fe (git)
Affected: 9ff05123e3bfbb1d2b68ba1d9bf1f7d1dffc1453 , < bae009a2f1b7c2011d2e92d8c84868d315c0b97e (git)
Affected: 9ff05123e3bfbb1d2b68ba1d9bf1f7d1dffc1453 , < b4d80bd6370b81a1725b6b8f7894802c23a14e9f (git)
Affected: 9ff05123e3bfbb1d2b68ba1d9bf1f7d1dffc1453 , < 6be49d100c22ffea3287a4b19d7639d259888e33 (git)
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Linux Linux Affected: 2.6.30
Unaffected: 0 , < 2.6.30 (semver)
Unaffected: 4.14.313 , ≤ 4.14.* (semver)
Unaffected: 4.19.281 , ≤ 4.19.* (semver)
Unaffected: 5.4.241 , ≤ 5.4.* (semver)
Unaffected: 5.10.178 , ≤ 5.10.* (semver)
Unaffected: 5.15.107 , ≤ 5.15.* (semver)
Unaffected: 6.1.24 , ≤ 6.1.* (semver)
Unaffected: 6.2.11 , ≤ 6.2.* (semver)
Unaffected: 6.3 , ≤ * (original_commit_for_fix)
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Since nilfs_segctor_kill_thread() does a final check to\\nsee if \\\"sc_task\\\" is NULL with \\\"sc_state_lock\\\" locked, this can eliminate\\nthe 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    "redhat_vex": {
      "aggregate_severity": "None",
      "current_release_date": "2026-06-30T10:29:43+00:00",
      "cve": "CVE-2023-53608",
      "id": "CVE-2023-53608",
      "initial_release_date": "2023-01-01T00:00:00+00:00",
      "product_status:known_not_affected": "274",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: nilfs2: fix potential UAF of struct nilfs_sc_info in nilfs_segctor_thread()",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2023/cve-2023-53608.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

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.