CVE-2025-40031 (GCVE-0-2025-40031)
Vulnerability from cvelistv5
Published
2025-10-28 11:48
Modified
2025-10-28 11:48
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: tee: fix register_shm_helper() In register_shm_helper(), fix incorrect error handling for a call to iov_iter_extract_pages(). A case is missing for when iov_iter_extract_pages() only got some pages and return a number larger than 0, but not the requested amount. This fixes a possible NULL pointer dereference following a bad input from ioctl(TEE_IOC_SHM_REGISTER) where parts of the buffer isn't mapped.
References
Impacted products
Vendor Product Version
Linux Linux Version: 7bdee41575919773818e525ea19e54eb817770af
Version: 7bdee41575919773818e525ea19e54eb817770af
Version: 7bdee41575919773818e525ea19e54eb817770af
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{
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          "product": "Linux",
          "programFiles": [
            "drivers/tee/tee_shm.c"
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              "operator": "OR"
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ntee: fix register_shm_helper()\n\nIn register_shm_helper(), fix incorrect error handling for a call to\niov_iter_extract_pages(). A case is missing for when\niov_iter_extract_pages() only got some pages and return a number larger\nthan 0, but not the requested amount.\n\nThis fixes a possible NULL pointer dereference following a bad input from\nioctl(TEE_IOC_SHM_REGISTER) where parts of the buffer isn\u0027t mapped."
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      "providerMetadata": {
        "dateUpdated": "2025-10-28T11:48:13.644Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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        {
          "url": "https://git.kernel.org/stable/c/d5cf5b37064b1699d946e8b7ab4ac7d7d101814c"
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      ],
      "title": "tee: fix register_shm_helper()",
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  "cveMetadata": {
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    "cveId": "CVE-2025-40031",
    "datePublished": "2025-10-28T11:48:13.644Z",
    "dateReserved": "2025-04-16T07:20:57.153Z",
    "dateUpdated": "2025-10-28T11:48:13.644Z",
    "state": "PUBLISHED"
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  }
}


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