CVE-2026-23228 (GCVE-0-2026-23228)
Vulnerability from cvelistv5
Published
2026-02-18 14:53
Modified
2026-04-13 06:02
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: smb: server: fix leak of active_num_conn in ksmbd_tcp_new_connection() On kthread_run() failure in ksmbd_tcp_new_connection(), the transport is freed via free_transport(), which does not decrement active_num_conn, leaking this counter. Replace free_transport() with ksmbd_tcp_disconnect().
References
Impacted products
Vendor Product Version
Linux Linux Version: 4210c3555db4b38bade92331b153e583261f05f9
Version: d5d7847e57ac69fa99c18b363a34419bcdb5a281
Version: 0d0d4680db22eda1eea785c47bbf66a9b33a8b16
Version: 0d0d4680db22eda1eea785c47bbf66a9b33a8b16
Version: 0d0d4680db22eda1eea785c47bbf66a9b33a8b16
Version: 0d0d4680db22eda1eea785c47bbf66a9b33a8b16
Version: 0d0d4680db22eda1eea785c47bbf66a9b33a8b16
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "fs/smb/server/transport_tcp.c"
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          ]
        },
        {
          "defaultStatus": "affected",
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          "programFiles": [
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          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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              "status": "affected",
              "version": "6.2"
            },
            {
              "lessThan": "6.2",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.201",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.164",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.125",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.72",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.11",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.19.*",
              "status": "unaffected",
              "version": "6.19.1",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.0",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.201",
                  "versionStartIncluding": "5.15.91",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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              ],
              "negate": false,
              "operator": "OR"
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          ]
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      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nsmb: server: fix leak of active_num_conn in ksmbd_tcp_new_connection()\n\nOn kthread_run() failure in ksmbd_tcp_new_connection(), the transport is\nfreed via free_transport(), which does not decrement active_num_conn,\nleaking this counter.\n\nReplace free_transport() with ksmbd_tcp_disconnect()."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-04-13T06:02:44.471Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/6dd2645cf080a75be31fa66063c7332b291f46f0"
        },
        {
          "url": "https://git.kernel.org/stable/c/7ddd69cd1338c6197e1b6b19cec60d99c8633e4f"
        },
        {
          "url": "https://git.kernel.org/stable/c/787769c8cc50416af7b8b1a36e6bcd6aaa7680aa"
        },
        {
          "url": "https://git.kernel.org/stable/c/baf664fc90a6139a39a58333e4aaa390c10d45dc"
        },
        {
          "url": "https://git.kernel.org/stable/c/cd25e0d809531a67e9dd53b19012d27d2b13425f"
        },
        {
          "url": "https://git.kernel.org/stable/c/599271110c35f6b16e2e4e45b9fbd47ed378c982"
        },
        {
          "url": "https://git.kernel.org/stable/c/77ffbcac4e569566d0092d5f22627dfc0896b553"
        }
      ],
      "title": "smb: server: fix leak of active_num_conn in ksmbd_tcp_new_connection()",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-23228",
    "datePublished": "2026-02-18T14:53:31.882Z",
    "dateReserved": "2026-01-13T15:37:45.988Z",
    "dateUpdated": "2026-04-13T06:02:44.471Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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