CVE-2025-71150 (GCVE-0-2025-71150)
Vulnerability from cvelistv5
Published
2026-01-23 14:15
Modified
2026-02-09 08:35
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: ksmbd: Fix refcount leak when invalid session is found on session lookup When a session is found but its state is not SMB2_SESSION_VALID, It indicates that no valid session was found, but it is missing to decrement the reference count acquired by the session lookup, which results in a reference count leak. This patch fixes the issue by explicitly calling ksmbd_user_session_put to release the reference to the session.
References
Impacted products
Vendor Product Version
Linux Linux Version: 37a0e2b362b3150317fb6e2139de67b1e29ae5ff
Version: 450a844c045ff0895d41b05a1cbe8febd1acfcfd
Version: a39e31e22a535d47b14656a7d6a893c7f6cf758c
Version: b95629435b84b9ecc0c765995204a4d8a913ed52
Version: b95629435b84b9ecc0c765995204a4d8a913ed52
Version: 2107ab40629aeabbec369cf34b8cf0f288c3eb1b
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "fs/smb/server/mgmt/user_session.c"
          ],
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        {
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          "product": "Linux",
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          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.13"
            },
            {
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              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
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              "version": "6.1.160",
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              "status": "unaffected",
              "version": "6.6.120",
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            },
            {
              "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"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.160",
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                  "vulnerable": true
                },
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              ],
              "negate": false,
              "operator": "OR"
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          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nksmbd: Fix refcount leak when invalid session is found on session lookup\n\nWhen a session is found but its state is not SMB2_SESSION_VALID, It\nindicates that no valid session was found, but it is missing to decrement\nthe reference count acquired by the session lookup, which results in\na reference count leak. This patch fixes the issue by explicitly calling\nksmbd_user_session_put to release the reference to the session."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-02-09T08:35:47.327Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/0fb87b28cafae71e9c8248432cc3a6a1fd759efc"
        },
        {
          "url": "https://git.kernel.org/stable/c/e54fb2a4772545701766cba08aab20de5eace8cd"
        },
        {
          "url": "https://git.kernel.org/stable/c/02e06785e85b4bd86ef3d23b7c8d87acc76773d5"
        },
        {
          "url": "https://git.kernel.org/stable/c/8cabcb4dd3dc85dd83a37d26efcc59a66a4074d7"
        },
        {
          "url": "https://git.kernel.org/stable/c/cafb57f7bdd57abba87725eb4e82bbdca4959644"
        }
      ],
      "title": "ksmbd: Fix refcount leak when invalid session is found on session lookup",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2025-71150",
    "datePublished": "2026-01-23T14:15:16.898Z",
    "dateReserved": "2026-01-13T15:30:19.662Z",
    "dateUpdated": "2026-02-09T08:35:47.327Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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