fkie_cve-2023-53524
Vulnerability from fkie_nvd
Published
2025-10-01 12:15
Modified
2025-10-02 19:11
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
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/059e426d666a41e26b184c177c1ca3ee2d6fa1b6
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/0ad8dd870aa187d0c21d032bb2c6433559075eec
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/58d1b717879bfeabe09b35e41ad667c79933eb2e
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/82f877ec9b041edc4c7c509c605cc3393d837bf0
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/de78456976026102babe66258c228691ca5677c0
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/eb1ef44efac797b384d361a76e33f77027c29a14
Impacted products
Vendor Product Version


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{
  "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."
    }
  ],
  "id": "CVE-2023-53524",
  "lastModified": "2025-10-02T19:11:46.753",
  "metrics": {},
  "published": "2025-10-01T12:15:56.880",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "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"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Awaiting Analysis"
}


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