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CVE-2023-54041 (GCVE-0-2023-54041)

Vulnerability from cvelistv5 – Published: 2025-12-24 10:56 – Updated: 2026-05-11 19:54
VLAI
Title
io_uring: fix memory leak when removing provided buffers
Summary
In the Linux kernel, the following vulnerability has been resolved: io_uring: fix memory leak when removing provided buffers When removing provided buffers, io_buffer structs are not being disposed of, leading to a memory leak. They can't be freed individually, because they are allocated in page-sized groups. They need to be added to some free list instead, such as io_buffers_cache. All callers already hold the lock protecting it, apart from when destroying buffers, so had to extend the lock there.
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: cc3cec8367cba76a8ae4c271eba8450f3efc1ba3 , < ac48787f58d1068f4e06d627c1135784d64b4c72 (git)
Affected: cc3cec8367cba76a8ae4c271eba8450f3efc1ba3 , < c117c15927772d1624c29c092b6bd3f47c7faa48 (git)
Affected: cc3cec8367cba76a8ae4c271eba8450f3efc1ba3 , < b4a72c0589fdea6259720375426179888969d6a2 (git)
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Linux Linux Affected: 5.18
Unaffected: 0 , < 5.18 (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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{
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          "product": "Linux",
          "programFiles": [
            "io_uring/io_uring.c",
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              "operator": "OR"
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nio_uring: fix memory leak when removing provided buffers\n\nWhen removing provided buffers, io_buffer structs are not being disposed\nof, leading to a memory leak. They can\u0027t be freed individually, because\nthey are allocated in page-sized groups. They need to be added to some\nfree list instead, such as io_buffers_cache. All callers already hold\nthe lock protecting it, apart from when destroying buffers, so had to\nextend the lock there."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-11T19:54:17.138Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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      "title": "io_uring: fix memory leak when removing provided buffers",
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  "cveMetadata": {
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    "cveId": "CVE-2023-54041",
    "datePublished": "2025-12-24T10:56:06.858Z",
    "dateReserved": "2025-12-24T10:53:46.181Z",
    "dateUpdated": "2026-05-11T19:54:17.138Z",
    "state": "PUBLISHED"
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      "date": "2026-09-18",
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      "percentile": "0.08721"
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                ],
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          {
            "lang": "en",
            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nio_uring: fix memory leak when removing provided buffers\n\nWhen removing provided buffers, io_buffer structs are not being disposed\nof, leading to a memory leak. They can\u0027t be freed individually, because\nthey are allocated in page-sized groups. They need to be added to some\nfree list instead, such as io_buffers_cache. All callers already hold\nthe lock protecting it, apart from when destroying buffers, so had to\nextend the lock there."
          }
        ],
        "id": "CVE-2023-54041",
        "lastModified": "2026-06-17T06:46:41.870",
        "metrics": {},
        "published": "2025-12-24T11:15:57.090",
        "references": [
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            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: Linux kernel: Memory leak in io_uring can lead to denial of service",
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      "version": "3"
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      "cve": "CVE-2023-54041",
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      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2023-54041",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2023-54041.json",
      "version": "20"
    }
  }
}



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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

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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.
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  • 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.


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