FKIE_CVE-2022-49296

Vulnerability from fkie_nvd - Published: 2025-02-26 07:01 - Updated: 2026-08-13 00:17
Severity
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/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: ceph: fix possible deadlock when holding Fwb to get inline_data 1, mount with wsync. 2, create a file with O_RDWR, and the request was sent to mds.0: ceph_atomic_open()--> ceph_mdsc_do_request(openc) finish_open(file, dentry, ceph_open)--> ceph_open()--> ceph_init_file()--> ceph_init_file_info()--> ceph_uninline_data()--> { ... if (inline_version == 1 || /* initial version, no data */ inline_version == CEPH_INLINE_NONE) goto out_unlock; ... } The inline_version will be 1, which is the initial version for the new create file. And here the ci->i_inline_version will keep with 1, it's buggy. 3, buffer write to the file immediately: ceph_write_iter()--> ceph_get_caps(file, need=Fw, want=Fb, ...); generic_perform_write()--> a_ops->write_begin()--> ceph_write_begin()--> netfs_write_begin()--> netfs_begin_read()--> netfs_rreq_submit_slice()--> netfs_read_from_server()--> rreq->netfs_ops->issue_read()--> ceph_netfs_issue_read()--> { ... if (ci->i_inline_version != CEPH_INLINE_NONE && ceph_netfs_issue_op_inline(subreq)) return; ... } ceph_put_cap_refs(ci, Fwb); The ceph_netfs_issue_op_inline() will send a getattr(Fsr) request to mds.1. 4, then the mds.1 will request the rd lock for CInode::filelock from the auth mds.0, the mds.0 will do the CInode::filelock state transation from excl --> sync, but it need to revoke the Fxwb caps back from the clients. While the kernel client has aleady held the Fwb caps and waiting for the getattr(Fsr). It's deadlock! URL: https://tracker.ceph.com/issues/55377
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/292b7a7275ce535a1abfa4dd0b2e586162aaae1ePatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/825978fd6a0defc3c29d8a38b6cea76a0938d21ePatch
Impacted products
Vendor Product Version
linux linux_kernel *
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "fs/ceph/addr.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "292b7a7275ce535a1abfa4dd0b2e586162aaae1e",
              "status": "affected",
              "version": "083db6fd3e73fc4f9ee74d2da1012a94216d6a60",
              "versionType": "git"
            },
            {
              "lessThan": "825978fd6a0defc3c29d8a38b6cea76a0938d21e",
              "status": "affected",
              "version": "083db6fd3e73fc4f9ee74d2da1012a94216d6a60",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "fs/ceph/addr.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": "5.18.*",
              "status": "unaffected",
              "version": "5.18.4",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "5.19",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "48912B8B-BDF1-422C-9CA5-2DDFDBAADC80",
              "versionEndExcluding": "5.18.4",
              "versionStartIncluding": "2.6.34",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nceph: fix possible deadlock when holding Fwb to get inline_data\n\n1, mount with wsync.\n2, create a file with O_RDWR, and the request was sent to mds.0:\n\n   ceph_atomic_open()--\u003e\n     ceph_mdsc_do_request(openc)\n     finish_open(file, dentry, ceph_open)--\u003e\n       ceph_open()--\u003e\n         ceph_init_file()--\u003e\n           ceph_init_file_info()--\u003e\n             ceph_uninline_data()--\u003e\n             {\n               ...\n               if (inline_version == 1 || /* initial version, no data */\n                   inline_version == CEPH_INLINE_NONE)\n                     goto out_unlock;\n               ...\n             }\n\nThe inline_version will be 1, which is the initial version for the\nnew create file. And here the ci-\u003ei_inline_version will keep with 1,\nit\u0027s buggy.\n\n3, buffer write to the file immediately:\n\n   ceph_write_iter()--\u003e\n     ceph_get_caps(file, need=Fw, want=Fb, ...);\n     generic_perform_write()--\u003e\n       a_ops-\u003ewrite_begin()--\u003e\n         ceph_write_begin()--\u003e\n           netfs_write_begin()--\u003e\n             netfs_begin_read()--\u003e\n               netfs_rreq_submit_slice()--\u003e\n                 netfs_read_from_server()--\u003e\n                   rreq-\u003enetfs_ops-\u003eissue_read()--\u003e\n                     ceph_netfs_issue_read()--\u003e\n                     {\n                       ...\n                       if (ci-\u003ei_inline_version != CEPH_INLINE_NONE \u0026\u0026\n                           ceph_netfs_issue_op_inline(subreq))\n                         return;\n                       ...\n                     }\n     ceph_put_cap_refs(ci, Fwb);\n\nThe ceph_netfs_issue_op_inline() will send a getattr(Fsr) request to\nmds.1.\n\n4, then the mds.1 will request the rd lock for CInode::filelock from\nthe auth mds.0, the mds.0 will do the CInode::filelock state transation\nfrom excl --\u003e sync, but it need to revoke the Fxwb caps back from the\nclients.\n\nWhile the kernel client has aleady held the Fwb caps and waiting for\nthe getattr(Fsr).\n\nIt\u0027s deadlock!\n\nURL: https://tracker.ceph.com/issues/55377"
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: ceph: se corrige un posible bloqueo al mantener presionado Fwb para obtener inline_data 1, montar con wsync. 2, crear un archivo con O_RDWR y la solicitud se envi\u00f3 a mds.0: ceph_atomic_open()--\u0026gt; ceph_mdsc_do_request(openc) finish_open(file, dentry, ceph_open)--\u0026gt; ceph_open()--\u0026gt; ceph_init_file()--\u0026gt; ceph_init_file_info()--\u0026gt; ceph_uninline_data()--\u0026gt; { ... if (inline_version == 1 || /* versi\u00f3n inicial, sin datos */ inline_version == CEPH_INLINE_NONE) goto out_unlock; ... } La inline_version ser\u00e1 1, que es la versi\u00f3n inicial para el nuevo archivo de creaci\u00f3n. Y aqu\u00ed, ci-\u0026gt;i_inline_version se mantendr\u00e1 con 1, es un error. 3, escribe en el b\u00fafer inmediatamente en el archivo: ceph_write_iter()--\u0026gt; ceph_get_caps(archivo, necesidad=Fw, deseo=Fb, ...); generic_perform_write()--\u0026gt; a_ops-\u0026gt;write_begin()--\u0026gt; ceph_write_begin()--\u0026gt; netfs_write_begin()--\u0026gt; netfs_begin_read()--\u0026gt; netfs_rreq_submit_slice()--\u0026gt; netfs_read_from_server()--\u0026gt; rreq-\u0026gt;netfs_ops-\u0026gt;issue_read()--\u0026gt; ceph_netfs_issue_read()--\u0026gt; { ... if (ci-\u0026gt;i_inline_version != CEPH_INLINE_NONE \u0026amp;\u0026amp; ceph_netfs_issue_op_inline(subreq)) return; ... } ceph_put_cap_refs(ci, Fwb); El ceph_netfs_issue_op_inline() enviar\u00e1 una solicitud getattr(Fsr) a mds.1.4, luego mds.1 solicitar\u00e1 el bloqueo de rd para CInode::filelock desde el mds.0 de autenticaci\u00f3n, el mds.0 realizar\u00e1 la transacci\u00f3n de estado de CInode::filelock desde excl --\u0026gt; sync, pero necesita revocar las capacidades Fxwb de los clientes. Mientras que el cliente del kernel ya ha retenido las capacidades Fwb y est\u00e1 esperando el getattr(Fsr). \u00a1Est\u00e1 en un punto muerto! URL: https://tracker.ceph.com/issues/55377"
    }
  ],
  "id": "CVE-2022-49296",
  "lastModified": "2026-08-13T00:17:31.190",
  "metrics": {
    "cvssMetricV31": [
      {
        "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"
      },
      {
        "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": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2022-49296",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2025-10-01T19:44:59.503744Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2025-02-26T07:01:06.433",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/292b7a7275ce535a1abfa4dd0b2e586162aaae1e"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/825978fd6a0defc3c29d8a38b6cea76a0938d21e"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-667"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    },
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-667"
        }
      ],
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "type": "Secondary"
    }
  ]
}



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