CVE-2026-80765 (GCVE-0-2026-80765)
Vulnerability from cvelistv5
Published
2026-09-04 15:12
Modified
2026-09-04 15:12
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: HID: hyperv: validate initial device info bounds The Hyper-V synthetic HID host supplies SYNTH_HID_INITIAL_DEVICE_INFO messages that contain a HID descriptor followed by the report descriptor bytes. mousevsc_on_receive_device_info() trusts bLength and wDescriptorLength without checking that the received packet contains both byte ranges. A malformed host or backend message can therefore make the guest read past the received VMBus packet while copying the report descriptor. Pass the received initial-device-info size into the parser and reject descriptor lengths that exceed the packet. Impact: A malicious Hyper-V host or backend can crash a guest by sending a short initial device-info message with an oversized HID report descriptor length.
References
Impacted products
Vendor Product Version
Linux Linux Version: b95f5bcb811e3905b5376f87789da8d097fee682
Version: b95f5bcb811e3905b5376f87789da8d097fee682
Version: b95f5bcb811e3905b5376f87789da8d097fee682
Version: b95f5bcb811e3905b5376f87789da8d097fee682
Version: b95f5bcb811e3905b5376f87789da8d097fee682
Version: b95f5bcb811e3905b5376f87789da8d097fee682
Version: b95f5bcb811e3905b5376f87789da8d097fee682
Version: b95f5bcb811e3905b5376f87789da8d097fee682
Version: b95f5bcb811e3905b5376f87789da8d097fee682
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{
  "containers": {
    "cna": {
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        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/hid/hid-hyperv.c"
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          "defaultStatus": "affected",
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          "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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              "version": "3.3"
            },
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              "version": "0",
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              "status": "unaffected",
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            },
            {
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              "status": "unaffected",
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              "status": "unaffected",
              "version": "6.1.185",
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              "version": "7.3-rc1",
              "versionType": "original_commit_for_fix"
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      ],
      "cpeApplicability": [
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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\nHID: hyperv: validate initial device info bounds\n\nThe Hyper-V synthetic HID host supplies SYNTH_HID_INITIAL_DEVICE_INFO\nmessages that contain a HID descriptor followed by the report descriptor\nbytes. mousevsc_on_receive_device_info() trusts bLength and\nwDescriptorLength without checking that the received packet contains both\nbyte ranges.\n\nA malformed host or backend message can therefore make the guest read\npast the received VMBus packet while copying the report descriptor. Pass\nthe received initial-device-info size into the parser and reject\ndescriptor lengths that exceed the packet.\n\nImpact: A malicious Hyper-V host or backend can crash a guest by sending\na short initial device-info message with an oversized HID report\ndescriptor length."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-04T15:12:37.639Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/e0d5d3e45e142b7ef7525654aaa54d3e986002a6"
        },
        {
          "url": "https://git.kernel.org/stable/c/390d3d9c52a710fdc9de95a537747397c0c671d1"
        },
        {
          "url": "https://git.kernel.org/stable/c/8614c043b11cc35ffebd35542ab4da275f8f923d"
        },
        {
          "url": "https://git.kernel.org/stable/c/334271d3812ab3197c95b4593bc6745f8d189114"
        },
        {
          "url": "https://git.kernel.org/stable/c/f84d777574b748b1a488723ca7be9d87a301a872"
        },
        {
          "url": "https://git.kernel.org/stable/c/608f8fd8c0f7b6268da43509447802955f210aac"
        },
        {
          "url": "https://git.kernel.org/stable/c/2529737763cb4bcfcaf397beeea2664656c865b4"
        },
        {
          "url": "https://git.kernel.org/stable/c/c894143c508a7e063aab9f73c9e835ab40121283"
        },
        {
          "url": "https://git.kernel.org/stable/c/934b7778aa7b7c8f6bb073d2a73ba3674885bae0"
        }
      ],
      "title": "HID: hyperv: validate initial device info bounds",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-80765",
    "datePublished": "2026-09-04T15:12:37.639Z",
    "dateReserved": "2026-08-26T14:34:25.791Z",
    "dateUpdated": "2026-09-04T15:12:37.639Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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