Vulnerability-Lookup

GHSA-G296-6QJ4-G8F8

Vulnerability from github – Published: 2025-12-24 12:30 – Updated: 2025-12-24 12:30

Details

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.

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2023-54041"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-12-24T11:15:57Z",
    "severity": null
  },
  "details": "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": "GHSA-g296-6qj4-g8f8",
  "modified": "2025-12-24T12:30:29Z",
  "published": "2025-12-24T12:30:28Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-54041"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ac48787f58d1068f4e06d627c1135784d64b4c72"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b4a72c0589fdea6259720375426179888969d6a2"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c117c15927772d1624c29c092b6bd3f47c7faa48"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

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

Vulnerability from cvelistv5 – Published: 2025-12-24 10:56 – Updated: 2026-05-11 19:54

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

Linux mitre root

References

3 references

URL	Tags
https://git.kernel.org/stable/c/ac48787f58d1068f4…
https://git.kernel.org/stable/c/c117c15927772d162…
https://git.kernel.org/stable/c/b4a72c0589fdea625…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: cc3cec8367cba76a8ae4c271eba8450f3efc1ba3 , < ac48787f58d1068f4e06d627c1135784d64b4c72 (git) Affected: cc3cec8367cba76a8ae4c271eba8450f3efc1ba3 , < c117c15927772d1624c29c092b6bd3f47c7faa48 (git) Affected: cc3cec8367cba76a8ae4c271eba8450f3efc1ba3 , < b4a72c0589fdea6259720375426179888969d6a2 (git)
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)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "io_uring/io_uring.c",
            "io_uring/kbuf.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "ac48787f58d1068f4e06d627c1135784d64b4c72",
              "status": "affected",
              "version": "cc3cec8367cba76a8ae4c271eba8450f3efc1ba3",
              "versionType": "git"
            },
            {
              "lessThan": "c117c15927772d1624c29c092b6bd3f47c7faa48",
              "status": "affected",
              "version": "cc3cec8367cba76a8ae4c271eba8450f3efc1ba3",
              "versionType": "git"
            },
            {
              "lessThan": "b4a72c0589fdea6259720375426179888969d6a2",
              "status": "affected",
              "version": "cc3cec8367cba76a8ae4c271eba8450f3efc1ba3",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "io_uring/io_uring.c",
            "io_uring/kbuf.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.18"
            },
            {
              "lessThan": "5.18",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.24",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.2.*",
              "status": "unaffected",
              "version": "6.2.11",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.3",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.24",
                  "versionStartIncluding": "5.18",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.2.11",
                  "versionStartIncluding": "5.18",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.3",
                  "versionStartIncluding": "5.18",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "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"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/ac48787f58d1068f4e06d627c1135784d64b4c72"
        },
        {
          "url": "https://git.kernel.org/stable/c/c117c15927772d1624c29c092b6bd3f47c7faa48"
        },
        {
          "url": "https://git.kernel.org/stable/c/b4a72c0589fdea6259720375426179888969d6a2"
        }
      ],
      "title": "io_uring: fix memory leak when removing provided buffers",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "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"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

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.