CVE-2023-53524 (GCVE-0-2023-53524)
Vulnerability from cvelistv5
Published
2025-10-01 11:46
Modified
2025-10-01 11:46
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: wifi: iwlwifi: pcie: Fix integer overflow in iwl_write_to_user_buf An integer overflow occurs in the iwl_write_to_user_buf() function, which is called by the iwl_dbgfs_monitor_data_read() function. static bool iwl_write_to_user_buf(char __user *user_buf, ssize_t count, void *buf, ssize_t *size, ssize_t *bytes_copied) { int buf_size_left = count - *bytes_copied; buf_size_left = buf_size_left - (buf_size_left % sizeof(u32)); if (*size > buf_size_left) *size = buf_size_left; If the user passes a SIZE_MAX value to the "ssize_t count" parameter, the ssize_t count parameter is assigned to "int buf_size_left". Then compare "*size" with "buf_size_left" . Here, "buf_size_left" is a negative number, so "*size" is assigned "buf_size_left" and goes into the third argument of the copy_to_user function, causing a heap overflow. This is not a security vulnerability because iwl_dbgfs_monitor_data_read() is a debugfs operation with 0400 privileges.
References
Impacted products
Vendor Product Version
Linux Linux Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
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{
  "containers": {
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      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/wireless/intel/iwlwifi/pcie/trans.c"
          ],
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          "product": "Linux",
          "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": "unaffected",
              "version": "5.4.244",
              "versionType": "semver"
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              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.181",
              "versionType": "semver"
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              "status": "unaffected",
              "version": "5.15.113",
              "versionType": "semver"
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            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.30",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.3.*",
              "status": "unaffected",
              "version": "6.3.4",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.4",
              "versionType": "original_commit_for_fix"
            }
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        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
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              "cpeMatch": [
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                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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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\nwifi: iwlwifi: pcie: Fix integer overflow in iwl_write_to_user_buf\n\nAn integer overflow occurs in the iwl_write_to_user_buf() function,\nwhich is called by the iwl_dbgfs_monitor_data_read() function.\n\nstatic bool iwl_write_to_user_buf(char __user *user_buf, ssize_t count,\n\t\t\t\t  void *buf, ssize_t *size,\n\t\t\t\t  ssize_t *bytes_copied)\n{\n\tint buf_size_left = count - *bytes_copied;\n\n\tbuf_size_left = buf_size_left - (buf_size_left % sizeof(u32));\n\tif (*size \u003e buf_size_left)\n\t\t*size = buf_size_left;\n\nIf the user passes a SIZE_MAX value to the \"ssize_t count\" parameter,\nthe ssize_t count parameter is assigned to \"int buf_size_left\".\nThen compare \"*size\" with \"buf_size_left\" . Here, \"buf_size_left\" is a\nnegative number, so \"*size\" is assigned \"buf_size_left\" and goes into\nthe third argument of the copy_to_user function, causing a heap overflow.\n\nThis is not a security vulnerability because iwl_dbgfs_monitor_data_read()\nis a debugfs operation with 0400 privileges."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-10-01T11:46:10.397Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/0ad8dd870aa187d0c21d032bb2c6433559075eec"
        },
        {
          "url": "https://git.kernel.org/stable/c/059e426d666a41e26b184c177c1ca3ee2d6fa1b6"
        },
        {
          "url": "https://git.kernel.org/stable/c/82f877ec9b041edc4c7c509c605cc3393d837bf0"
        },
        {
          "url": "https://git.kernel.org/stable/c/eb1ef44efac797b384d361a76e33f77027c29a14"
        },
        {
          "url": "https://git.kernel.org/stable/c/de78456976026102babe66258c228691ca5677c0"
        },
        {
          "url": "https://git.kernel.org/stable/c/58d1b717879bfeabe09b35e41ad667c79933eb2e"
        }
      ],
      "title": "wifi: iwlwifi: pcie: Fix integer overflow in iwl_write_to_user_buf",
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  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2023-53524",
    "datePublished": "2025-10-01T11:46:10.397Z",
    "dateReserved": "2025-10-01T11:39:39.407Z",
    "dateUpdated": "2025-10-01T11:46:10.397Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2023-53524\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-10-01T12:15:56.880\",\"lastModified\":\"2025-10-02T19:11:46.753\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nwifi: iwlwifi: pcie: Fix integer overflow in iwl_write_to_user_buf\\n\\nAn integer overflow occurs in the iwl_write_to_user_buf() function,\\nwhich is called by the iwl_dbgfs_monitor_data_read() function.\\n\\nstatic bool iwl_write_to_user_buf(char __user *user_buf, ssize_t count,\\n\\t\\t\\t\\t  void *buf, ssize_t *size,\\n\\t\\t\\t\\t  ssize_t *bytes_copied)\\n{\\n\\tint buf_size_left = count - *bytes_copied;\\n\\n\\tbuf_size_left = buf_size_left - (buf_size_left % sizeof(u32));\\n\\tif (*size \u003e buf_size_left)\\n\\t\\t*size = buf_size_left;\\n\\nIf the user passes a SIZE_MAX value to the \\\"ssize_t count\\\" parameter,\\nthe ssize_t count parameter is assigned to \\\"int buf_size_left\\\".\\nThen compare \\\"*size\\\" with \\\"buf_size_left\\\" . Here, \\\"buf_size_left\\\" is a\\nnegative number, so \\\"*size\\\" is assigned \\\"buf_size_left\\\" and goes into\\nthe third argument of the copy_to_user function, causing a heap overflow.\\n\\nThis is not a security vulnerability because iwl_dbgfs_monitor_data_read()\\nis a debugfs operation with 0400 privileges.\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/059e426d666a41e26b184c177c1ca3ee2d6fa1b6\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/0ad8dd870aa187d0c21d032bb2c6433559075eec\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/58d1b717879bfeabe09b35e41ad667c79933eb2e\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/82f877ec9b041edc4c7c509c605cc3393d837bf0\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/de78456976026102babe66258c228691ca5677c0\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/eb1ef44efac797b384d361a76e33f77027c29a14\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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