Vulnerability-Lookup

FKIE_CVE-2024-50241

Vulnerability from fkie_nvd - Published: 2024-11-09 11:15 - Updated: 2026-08-04 11:21

Severity

7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Summary

In the Linux kernel, the following vulnerability has been resolved: NFSD: Initialize struct nfsd4_copy earlier Ensure the refcount and async_copies fields are initialized early. cleanup_async_copy() will reference these fields if an error occurs in nfsd4_copy(). If they are not correctly initialized, at the very least, a refcount underflow occurs.

References

URL	Tags
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/059434d23c4578d9d02efb92d848ea21bc640112
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/421f1a2a1afb47d88de09457ef7687e1df7bc997
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/63fab04cbd0f96191b6e5beedc3b643b01c15889	Mailing List, Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/7267625baf365a969f1b25ded6f07b64bc90ec5b
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/c3074003fa6837c2b89a34d8d12d9463b59d22d6
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/e30a9a2f69c34a00a3cb4fd45c5d231929e66fb1	Mailing List, Patch

Impacted products

Vendor	Product	Version
linux	linux_kernel	*
linux	linux_kernel	6.12
linux	linux_kernel	6.12
linux	linux_kernel	6.12
linux	linux_kernel	6.12
linux	linux_kernel	6.12

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "fs/nfsd/nfs4proc.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "059434d23c4578d9d02efb92d848ea21bc640112",
              "status": "affected",
              "version": "9e52ff544e0bfa09ee339fd7b0937ee3c080c24e",
              "versionType": "git"
            },
            {
              "lessThan": "7267625baf365a969f1b25ded6f07b64bc90ec5b",
              "status": "affected",
              "version": "43e46ee5efc03990b223f7aa8b77aa9c3d3acfdf",
              "versionType": "git"
            },
            {
              "lessThan": "c3074003fa6837c2b89a34d8d12d9463b59d22d6",
              "status": "affected",
              "version": "7ea9260874b779637aff6d24c344b8ef4ac862a0",
              "versionType": "git"
            },
            {
              "lessThan": "421f1a2a1afb47d88de09457ef7687e1df7bc997",
              "status": "affected",
              "version": "ae267989b7b7933dfedcd26468d0a88fc3a9da9e",
              "versionType": "git"
            },
            {
              "lessThan": "e30a9a2f69c34a00a3cb4fd45c5d231929e66fb1",
              "status": "affected",
              "version": "6a488ad7745b8f64625c6d3a24ce7e448e83f11b",
              "versionType": "git"
            },
            {
              "lessThan": "63fab04cbd0f96191b6e5beedc3b643b01c15889",
              "status": "affected",
              "version": "aadc3bbea163b6caaaebfdd2b6c4667fbc726752",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "b4e21431a0db4854b5023cd5af001be557e6c3db",
              "versionType": "git"
            },
            {
              "lessThan": "6.11",
              "status": "affected",
              "version": "6.10.14",
              "versionType": "semver"
            }
          ]
        },
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "fs/nfsd/nfs4proc.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "6.11.7",
              "status": "affected",
              "version": "6.11.3",
              "versionType": "semver"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "A3DF55BE-3AB2-4FEF-9C96-158917FB1E4C",
              "versionEndExcluding": "6.11.7",
              "versionStartIncluding": "6.10.14",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:6.12:rc1:*:*:*:*:*:*",
              "matchCriteriaId": "7F361E1D-580F-4A2D-A509-7615F73167A1",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:6.12:rc2:*:*:*:*:*:*",
              "matchCriteriaId": "925478D0-3E3D-4E6F-ACD5-09F28D5DF82C",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:6.12:rc3:*:*:*:*:*:*",
              "matchCriteriaId": "3C95E234-D335-4B6C-96BF-E2CEBD8654ED",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:6.12:rc4:*:*:*:*:*:*",
              "matchCriteriaId": "E0F717D8-3014-4F84-8086-0124B2111379",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:6.12:rc5:*:*:*:*:*:*",
              "matchCriteriaId": "24DBE6C7-2AAE-4818-AED2-E131F153D2FA",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nNFSD: Initialize struct nfsd4_copy earlier\n\nEnsure the refcount and async_copies fields are initialized early.\ncleanup_async_copy() will reference these fields if an error occurs\nin nfsd4_copy(). If they are not correctly initialized, at the very\nleast, a refcount underflow occurs."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: NFSD: inicializar struct nfsd4_copy antes Aseg\u00farese de que los campos refcount y async_copies se inicialicen antes. cleanup_async_copy() har\u00e1 referencia a estos campos si se produce un error en nfsd4_copy(). Si no se inicializan correctamente, como m\u00ednimo, se produce un desbordamiento de refcount."
    }
  ],
  "id": "CVE-2024-50241",
  "lastModified": "2026-08-04T11:21:36.033",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 7.5,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 3.6,
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "type": "Secondary"
      },
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 5.5,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 3.6,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2024-11-09T11:15:09.823",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/059434d23c4578d9d02efb92d848ea21bc640112"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/421f1a2a1afb47d88de09457ef7687e1df7bc997"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Mailing List",
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/63fab04cbd0f96191b6e5beedc3b643b01c15889"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/7267625baf365a969f1b25ded6f07b64bc90ec5b"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/c3074003fa6837c2b89a34d8d12d9463b59d22d6"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Mailing List",
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/e30a9a2f69c34a00a3cb4fd45c5d231929e66fb1"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-908"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}

CVE-2024-50241 (GCVE-0-2024-50241)

Vulnerability from cvelistv5 – Published: 2024-11-09 10:14 – Updated: 2026-08-05 11:42

Title

NFSD: Initialize struct nfsd4_copy earlier

Summary

Severity

7.5 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Assigner

Linux mitre root

References

6 references

URL	Tags
https://git.kernel.org/stable/c/059434d23c4578d9d…
https://git.kernel.org/stable/c/7267625baf365a969…
https://git.kernel.org/stable/c/c3074003fa6837c2b…
https://git.kernel.org/stable/c/421f1a2a1afb47d88…
https://git.kernel.org/stable/c/e30a9a2f69c34a00a…
https://git.kernel.org/stable/c/63fab04cbd0f96191…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 9e52ff544e0bfa09ee339fd7b0937ee3c080c24e , < 059434d23c4578d9d02efb92d848ea21bc640112 (git) Affected: 43e46ee5efc03990b223f7aa8b77aa9c3d3acfdf , < 7267625baf365a969f1b25ded6f07b64bc90ec5b (git) Affected: 7ea9260874b779637aff6d24c344b8ef4ac862a0 , < c3074003fa6837c2b89a34d8d12d9463b59d22d6 (git) Affected: ae267989b7b7933dfedcd26468d0a88fc3a9da9e , < 421f1a2a1afb47d88de09457ef7687e1df7bc997 (git) Affected: 6a488ad7745b8f64625c6d3a24ce7e448e83f11b , < e30a9a2f69c34a00a3cb4fd45c5d231929e66fb1 (git) Affected: aadc3bbea163b6caaaebfdd2b6c4667fbc726752 , < 63fab04cbd0f96191b6e5beedc3b643b01c15889 (git) Affected: b4e21431a0db4854b5023cd5af001be557e6c3db (git) Affected: 6.10.14 , < 6.11 (semver)
Linux	Linux	Affected: 6.11.3 , < 6.11.7 (semver)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "fs/nfsd/nfs4proc.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "059434d23c4578d9d02efb92d848ea21bc640112",
              "status": "affected",
              "version": "9e52ff544e0bfa09ee339fd7b0937ee3c080c24e",
              "versionType": "git"
            },
            {
              "lessThan": "7267625baf365a969f1b25ded6f07b64bc90ec5b",
              "status": "affected",
              "version": "43e46ee5efc03990b223f7aa8b77aa9c3d3acfdf",
              "versionType": "git"
            },
            {
              "lessThan": "c3074003fa6837c2b89a34d8d12d9463b59d22d6",
              "status": "affected",
              "version": "7ea9260874b779637aff6d24c344b8ef4ac862a0",
              "versionType": "git"
            },
            {
              "lessThan": "421f1a2a1afb47d88de09457ef7687e1df7bc997",
              "status": "affected",
              "version": "ae267989b7b7933dfedcd26468d0a88fc3a9da9e",
              "versionType": "git"
            },
            {
              "lessThan": "e30a9a2f69c34a00a3cb4fd45c5d231929e66fb1",
              "status": "affected",
              "version": "6a488ad7745b8f64625c6d3a24ce7e448e83f11b",
              "versionType": "git"
            },
            {
              "lessThan": "63fab04cbd0f96191b6e5beedc3b643b01c15889",
              "status": "affected",
              "version": "aadc3bbea163b6caaaebfdd2b6c4667fbc726752",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "b4e21431a0db4854b5023cd5af001be557e6c3db",
              "versionType": "git"
            },
            {
              "lessThan": "6.11",
              "status": "affected",
              "version": "6.10.14",
              "versionType": "semver"
            }
          ]
        },
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "fs/nfsd/nfs4proc.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "6.11.7",
              "status": "affected",
              "version": "6.11.3",
              "versionType": "semver"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.11.7",
                  "versionStartIncluding": "6.11.3",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionStartIncluding": "6.10.14",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nNFSD: Initialize struct nfsd4_copy earlier\n\nEnsure the refcount and async_copies fields are initialized early.\ncleanup_async_copy() will reference these fields if an error occurs\nin nfsd4_copy(). If they are not correctly initialized, at the very\nleast, a refcount underflow occurs."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:N - The flaw is in nfsd\u0027s NFSv4.2 `OP_COPY` handler (`fs/nfsd/nfs4proc.c:nfsd4_copy()`), reached purely by sending a COMPOUND over TCP/2049 from a remote NFS client. The `ca_synchronous` flag that selects the vulnerable async branch is decoded directly from the wire in `nfsd4_decode_copy()`.\nAC:L - The attacker fully controls both trigger conditions \u2014 setting `ca_synchronous=false` and issuing more concurrent async COPYs than `sp_nrthreads` (default 8) by first parking several long-running copies. There is no race outside the attacker\u0027s control, no memory-layout dependency, and no unusual kernel configuration needed for the intra-server path.\nPR:N - Under AUTH_SYS \u2014 the default and overwhelmingly common NFS configuration \u2014 the server verifies no secret; a client simply asserts a UID to complete EXCHANGE_ID/CREATE_SESSION and OPEN the source/destination files, so no credentials in the CVSS sense are required. This matches the PR:N assigned to CVE-2024-53073, the companion fix to the identical error path.\nUI:N - The attacker\u0027s own COPY requests drive the entire sequence; no administrator or user on the NFS server has to open a file, mount anything, or take any action.\nS:U - The refcount underflow and leaked allocation are confined to the NFS server kernel\u0027s own memory and security authority, with no crossing into a hypervisor, IOMMU, or sandbox boundary.\nC:N - The underflow is caught by `refcount_warn_saturate()` and the object is simply never freed \u2014 there is no out-of-bounds read, no use-after-free of live data, and nothing from kernel memory is returned to the requesting client.\nI:N - No attacker-controlled write occurs: the leaked `struct nfsd4_copy` is unreachable and its refcount is saturated, so it is never reused or freed, yielding no corruption or control-flow primitive.\nA:H - `WARN_ONCE(\"refcount_t: underflow; use-after-free\")` panics the server outright on the common hardened/cloud setting `panic_on_warn=1`, and absent that, every triggering request permanently leaks a ~0.5 KB slab object, giving an unauthenticated remote client an unbounded kernel memory-exhaustion primitive that drives the NFS server to OOM."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-05T11:42:42.206Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/059434d23c4578d9d02efb92d848ea21bc640112"
        },
        {
          "url": "https://git.kernel.org/stable/c/7267625baf365a969f1b25ded6f07b64bc90ec5b"
        },
        {
          "url": "https://git.kernel.org/stable/c/c3074003fa6837c2b89a34d8d12d9463b59d22d6"
        },
        {
          "url": "https://git.kernel.org/stable/c/421f1a2a1afb47d88de09457ef7687e1df7bc997"
        },
        {
          "url": "https://git.kernel.org/stable/c/e30a9a2f69c34a00a3cb4fd45c5d231929e66fb1"
        },
        {
          "url": "https://git.kernel.org/stable/c/63fab04cbd0f96191b6e5beedc3b643b01c15889"
        }
      ],
      "title": "NFSD: Initialize struct nfsd4_copy earlier",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2024-50241",
    "datePublished": "2024-11-09T10:14:51.119Z",
    "dateReserved": "2024-10-21T19:36:19.976Z",
    "dateUpdated": "2026-08-05T11:42:42.206Z",
    "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.