CVE-2025-37777 (GCVE-0-2025-37777)
Vulnerability from cvelistv5
Published
2025-05-01 13:07
Modified
2025-08-09 14:20
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix use-after-free in __smb2_lease_break_noti() Move tcp_transport free to ksmbd_conn_free. If ksmbd connection is referenced when ksmbd server thread terminates, It will not be freed, but conn->tcp_transport is freed. __smb2_lease_break_noti can be performed asynchronously when the connection is disconnected. __smb2_lease_break_noti calls ksmbd_conn_write, which can cause use-after-free when conn->ksmbd_transport is already freed.
References
Impacted products
Vendor Product Version
Linux Linux Version: 0626e6641f6b467447c81dd7678a69c66f7746cf
Version: 0626e6641f6b467447c81dd7678a69c66f7746cf
Version: 0626e6641f6b467447c81dd7678a69c66f7746cf
Version: 0626e6641f6b467447c81dd7678a69c66f7746cf
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "fs/smb/server/connection.c",
            "fs/smb/server/transport_tcp.c",
            "fs/smb/server/transport_tcp.h"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "1da8bd9a10ecd718692732294d15fd801c0eabb5",
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              "version": "0626e6641f6b467447c81dd7678a69c66f7746cf",
              "versionType": "git"
            },
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              "versionType": "git"
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          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "fs/smb/server/connection.c",
            "fs/smb/server/transport_tcp.c",
            "fs/smb/server/transport_tcp.h"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.15"
            },
            {
              "lessThan": "5.15",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.101",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.26",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.14.*",
              "status": "unaffected",
              "version": "6.14.4",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.15",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
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              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.101",
                  "versionStartIncluding": "5.15",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.26",
                  "versionStartIncluding": "5.15",
                  "vulnerable": true
                },
                {
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                  "versionEndExcluding": "6.14.4",
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                {
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                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nksmbd: fix use-after-free in __smb2_lease_break_noti()\n\nMove tcp_transport free to ksmbd_conn_free. If ksmbd connection is\nreferenced when ksmbd server thread terminates, It will not be freed,\nbut conn-\u003etcp_transport is freed. __smb2_lease_break_noti can be performed\nasynchronously when the connection is disconnected. __smb2_lease_break_noti\ncalls ksmbd_conn_write, which can cause use-after-free\nwhen conn-\u003eksmbd_transport is already freed."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-08-09T14:20:09.676Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/1da8bd9a10ecd718692732294d15fd801c0eabb5"
        },
        {
          "url": "https://git.kernel.org/stable/c/1aec4d14cf81b7b3e7b69eb1cfa94144eed7138e"
        },
        {
          "url": "https://git.kernel.org/stable/c/e59796fc80603bcd8569d4d2e10b213c1918edb4"
        },
        {
          "url": "https://git.kernel.org/stable/c/21a4e47578d44c6b37c4fc4aba8ed7cc8dbb13de"
        }
      ],
      "title": "ksmbd: fix use-after-free in __smb2_lease_break_noti()",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2025-37777",
    "datePublished": "2025-05-01T13:07:15.741Z",
    "dateReserved": "2025-04-16T04:51:23.939Z",
    "dateUpdated": "2025-08-09T14:20:09.676Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2025-37777\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-05-01T14:15:41.493\",\"lastModified\":\"2025-08-01T09:15:31.173\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nksmbd: fix use-after-free in __smb2_lease_break_noti()\\n\\nMove tcp_transport free to ksmbd_conn_free. If ksmbd connection is\\nreferenced when ksmbd server thread terminates, It will not be freed,\\nbut conn-\u003etcp_transport is freed. __smb2_lease_break_noti can be performed\\nasynchronously when the connection is disconnected. __smb2_lease_break_noti\\ncalls ksmbd_conn_write, which can cause use-after-free\\nwhen conn-\u003eksmbd_transport is already freed.\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: ksmbd: se corrige el error \\\"use-after-free\\\" en __smb2_lease_break_noti(). Se mueve tcp_transport libre a ksmbd_conn_free. Si se hace referencia a la conexi\u00f3n ksmbd al finalizar el subproceso del servidor ksmbd, no se liberar\u00e1, pero s\u00ed se liberar\u00e1 conn-\u0026gt;tcp_transport. __smb2_lease_break_noti puede ejecutarse asincr\u00f3nicamente cuando se desconecta la conexi\u00f3n. __smb2_lease_break_noti llama a ksmbd_conn_write, lo que puede causar un error \\\"use-after-free\\\" cuando conn-\u0026gt;ksmbd_transport ya est\u00e1 liberado.\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/1aec4d14cf81b7b3e7b69eb1cfa94144eed7138e\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/1da8bd9a10ecd718692732294d15fd801c0eabb5\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/21a4e47578d44c6b37c4fc4aba8ed7cc8dbb13de\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/e59796fc80603bcd8569d4d2e10b213c1918edb4\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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