CVE-2025-40172 (GCVE-0-2025-40172)
Vulnerability from cvelistv5
Published
2025-11-12 10:53
Modified
2025-11-12 10:53
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: accel/qaic: Treat remaining == 0 as error in find_and_map_user_pages() Currently, if find_and_map_user_pages() takes a DMA xfer request from the user with a length field set to 0, or in a rare case, the host receives QAIC_TRANS_DMA_XFER_CONT from the device where resources->xferred_dma_size is equal to the requested transaction size, the function will return 0 before allocating an sgt or setting the fields of the dma_xfer struct. In that case, encode_addr_size_pairs() will try to access the sgt which will lead to a general protection fault. Return an EINVAL in case the user provides a zero-sized ALP, or the device requests continuation after all of the bytes have been transferred.
References
Impacted products
Vendor Product Version
Linux Linux Version: 96d3c1cadedb6ae2e8965e19cd12caa244afbd9c
Version: 96d3c1cadedb6ae2e8965e19cd12caa244afbd9c
Version: 96d3c1cadedb6ae2e8965e19cd12caa244afbd9c
Version: 96d3c1cadedb6ae2e8965e19cd12caa244afbd9c
Version: d410a96e5cb8c1ec7049c83f2edcd8bbfaf5d9b3
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{
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          "product": "Linux",
          "programFiles": [
            "drivers/accel/qaic/qaic_control.c"
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          "vendor": "Linux",
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      "cpeApplicability": [
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          "nodes": [
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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\naccel/qaic: Treat remaining == 0 as error in find_and_map_user_pages()\n\nCurrently, if find_and_map_user_pages() takes a DMA xfer request from the\nuser with a length field set to 0, or in a rare case, the host receives\nQAIC_TRANS_DMA_XFER_CONT from the device where resources-\u003exferred_dma_size\nis equal to the requested transaction size, the function will return 0\nbefore allocating an sgt or setting the fields of the dma_xfer struct.\nIn that case, encode_addr_size_pairs() will try to access the sgt which\nwill lead to a general protection fault.\n\nReturn an EINVAL in case the user provides a zero-sized ALP, or the device\nrequests continuation after all of the bytes have been transferred."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-11-12T10:53:49.245Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
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          "url": "https://git.kernel.org/stable/c/48b1d42286bfef7628b1d6c8c28d4e456c90f725"
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        },
        {
          "url": "https://git.kernel.org/stable/c/11f08c30a3e4157305ba692f1d44cca5fc9a8fca"
        }
      ],
      "title": "accel/qaic: Treat remaining == 0 as error in find_and_map_user_pages()",
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    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2025-40172",
    "datePublished": "2025-11-12T10:53:49.245Z",
    "dateReserved": "2025-04-16T07:20:57.177Z",
    "dateUpdated": "2025-11-12T10:53:49.245Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2025-40172\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-11-12T11:15:47.643\",\"lastModified\":\"2025-11-12T16:19:12.850\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\naccel/qaic: Treat remaining == 0 as error in find_and_map_user_pages()\\n\\nCurrently, if find_and_map_user_pages() takes a DMA xfer request from the\\nuser with a length field set to 0, or in a rare case, the host receives\\nQAIC_TRANS_DMA_XFER_CONT from the device where resources-\u003exferred_dma_size\\nis equal to the requested transaction size, the function will return 0\\nbefore allocating an sgt or setting the fields of the dma_xfer struct.\\nIn that case, encode_addr_size_pairs() will try to access the sgt which\\nwill lead to a general protection fault.\\n\\nReturn an EINVAL in case the user provides a zero-sized ALP, or the device\\nrequests continuation after all of the bytes have been transferred.\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/11f08c30a3e4157305ba692f1d44cca5fc9a8fca\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/1ab9733d14cc9987cc5dcd1f0ad1f416e302e2e6\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/48b1d42286bfef7628b1d6c8c28d4e456c90f725\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/551f1dfbcb7f3e6ed07f9d6c8c1c64337fcd0ede\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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