FKIE_CVE-2025-68817

Vulnerability from fkie_nvd - Published: 2026-01-13 16:16 - Updated: 2026-06-17 09:59
Severity
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix use-after-free in ksmbd_tree_connect_put under concurrency Under high concurrency, A tree-connection object (tcon) is freed on a disconnect path while another path still holds a reference and later executes *_put()/write on it.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/063cbbc6f595ea36ad146e1b7d2af820894beb21Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/21a3d01fc6db5129f81edb0ab7cb94fd758bcbeaPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/446beed646b2e426dd53d27358365f8678e1dd01Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/b39a1833cc4a2755b02603eec3a71a85e9dff926Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/d092de8a26c952379ded8e6b0bda31d89befac1aPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/d64977495e44855f2b28d8ce56107c963a7a50e4Patch
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel 6.6
linux linux_kernel 6.6
linux linux_kernel 6.6
linux linux_kernel 6.6
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "fs/smb/server/mgmt/tree_connect.c",
            "fs/smb/server/mgmt/tree_connect.h",
            "fs/smb/server/smb2pdu.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "446beed646b2e426dd53d27358365f8678e1dd01",
              "status": "affected",
              "version": "dd45db4d9bbc8f122a9b4db5ce94ae29fcf03d3c",
              "versionType": "git"
            },
            {
              "lessThan": "d092de8a26c952379ded8e6b0bda31d89befac1a",
              "status": "affected",
              "version": "7b58ee8d0b91359554cf219cd4f33872ea2afd66",
              "versionType": "git"
            },
            {
              "lessThan": "d64977495e44855f2b28d8ce56107c963a7a50e4",
              "status": "affected",
              "version": "33b235a6e6ebe0f05f3586a71e8d281d00f71e2e",
              "versionType": "git"
            },
            {
              "lessThan": "21a3d01fc6db5129f81edb0ab7cb94fd758bcbea",
              "status": "affected",
              "version": "33b235a6e6ebe0f05f3586a71e8d281d00f71e2e",
              "versionType": "git"
            },
            {
              "lessThan": "063cbbc6f595ea36ad146e1b7d2af820894beb21",
              "status": "affected",
              "version": "33b235a6e6ebe0f05f3586a71e8d281d00f71e2e",
              "versionType": "git"
            },
            {
              "lessThan": "b39a1833cc4a2755b02603eec3a71a85e9dff926",
              "status": "affected",
              "version": "33b235a6e6ebe0f05f3586a71e8d281d00f71e2e",
              "versionType": "git"
            },
            {
              "lessThan": "5.15.199",
              "status": "affected",
              "version": "5.15.145",
              "versionType": "semver"
            },
            {
              "lessThan": "6.1.160",
              "status": "affected",
              "version": "6.1.71",
              "versionType": "semver"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "fs/smb/server/mgmt/tree_connect.c",
            "fs/smb/server/mgmt/tree_connect.h",
            "fs/smb/server/smb2pdu.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.6"
            },
            {
              "lessThan": "6.6",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.199",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.160",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.120",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.64",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.3",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.19",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "E1261CF8-0493-4918-93E6-5CC197F7F5E8",
              "versionEndExcluding": "5.15.199",
              "versionStartIncluding": "5.15.145",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "9295139C-2E02-401E-8245-07E821E9CCF0",
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            },
            {
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              "matchCriteriaId": "C5F84D90-D922-47D3-B042-99569840DD8F",
              "versionEndExcluding": "6.6.120",
              "versionStartIncluding": "6.6.1",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "32BF4A52-377C-44ED-B5E6-7EA5D896E98B",
              "versionEndExcluding": "6.12.64",
              "versionStartIncluding": "6.7",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "2DC484D8-FB4F-4112-900F-AE333B6FE7A7",
              "versionEndExcluding": "6.18.3",
              "versionStartIncluding": "6.13",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:6.6:-:*:*:*:*:*:*",
              "matchCriteriaId": "E346B162-D566-4E62-ABDE-ECBFB21B8BFD",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:6.6:rc5:*:*:*:*:*:*",
              "matchCriteriaId": "E7C78D0A-C4A2-4D41-B726-8979E33AD0F9",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:6.6:rc6:*:*:*:*:*:*",
              "matchCriteriaId": "E114E9DD-F7E1-40CC-AAD5-F14E586CB2E6",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:6.6:rc7:*:*:*:*:*:*",
              "matchCriteriaId": "DC5BD782-474C-4A68-AED7-6EC818FF89AE",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nksmbd: fix use-after-free in ksmbd_tree_connect_put under concurrency\n\nUnder high concurrency, A tree-connection object (tcon) is freed on\na disconnect path while another path still holds a reference and later\nexecutes *_put()/write on it."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nksmbd: correcci\u00f3n de uso despu\u00e9s de liberaci\u00f3n en ksmbd_tree_connect_put bajo concurrencia\n\nBajo alta concurrencia, un objeto de conexi\u00f3n de \u00e1rbol (tcon) es liberado en una ruta de desconexi\u00f3n mientras otra ruta a\u00fan mantiene una referencia y posteriormente ejecuta *_put()/write sobre \u00e9l."
    }
  ],
  "id": "CVE-2025-68817",
  "lastModified": "2026-06-17T09:59:40.107",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 7.8,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 5.9,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2026-01-13T16:16:03.983",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/063cbbc6f595ea36ad146e1b7d2af820894beb21"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/21a3d01fc6db5129f81edb0ab7cb94fd758bcbea"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
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      "url": "https://git.kernel.org/stable/c/446beed646b2e426dd53d27358365f8678e1dd01"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/b39a1833cc4a2755b02603eec3a71a85e9dff926"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/d092de8a26c952379ded8e6b0bda31d89befac1a"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/d64977495e44855f2b28d8ce56107c963a7a50e4"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-416"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}


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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.
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