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FKIE_CVE-2026-80765

Vulnerability from fkie_nvd - Published: 2026-09-04 16:18 - Updated: 2026-09-04 16:18
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
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/2529737763cb4bcfcaf397beeea2664656c865b4
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/334271d3812ab3197c95b4593bc6745f8d189114
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/390d3d9c52a710fdc9de95a537747397c0c671d1
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/608f8fd8c0f7b6268da43509447802955f210aac
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/8614c043b11cc35ffebd35542ab4da275f8f923d
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/934b7778aa7b7c8f6bb073d2a73ba3674885bae0
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/c894143c508a7e063aab9f73c9e835ab40121283
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/e0d5d3e45e142b7ef7525654aaa54d3e986002a6
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/f84d777574b748b1a488723ca7be9d87a301a872
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/hid/hid-hyperv.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "e0d5d3e45e142b7ef7525654aaa54d3e986002a6",
              "status": "affected",
              "version": "b95f5bcb811e3905b5376f87789da8d097fee682",
              "versionType": "git"
            },
            {
              "lessThan": "390d3d9c52a710fdc9de95a537747397c0c671d1",
              "status": "affected",
              "version": "b95f5bcb811e3905b5376f87789da8d097fee682",
              "versionType": "git"
            },
            {
              "lessThan": "8614c043b11cc35ffebd35542ab4da275f8f923d",
              "status": "affected",
              "version": "b95f5bcb811e3905b5376f87789da8d097fee682",
              "versionType": "git"
            },
            {
              "lessThan": "334271d3812ab3197c95b4593bc6745f8d189114",
              "status": "affected",
              "version": "b95f5bcb811e3905b5376f87789da8d097fee682",
              "versionType": "git"
            },
            {
              "lessThan": "f84d777574b748b1a488723ca7be9d87a301a872",
              "status": "affected",
              "version": "b95f5bcb811e3905b5376f87789da8d097fee682",
              "versionType": "git"
            },
            {
              "lessThan": "608f8fd8c0f7b6268da43509447802955f210aac",
              "status": "affected",
              "version": "b95f5bcb811e3905b5376f87789da8d097fee682",
              "versionType": "git"
            },
            {
              "lessThan": "2529737763cb4bcfcaf397beeea2664656c865b4",
              "status": "affected",
              "version": "b95f5bcb811e3905b5376f87789da8d097fee682",
              "versionType": "git"
            },
            {
              "lessThan": "c894143c508a7e063aab9f73c9e835ab40121283",
              "status": "affected",
              "version": "b95f5bcb811e3905b5376f87789da8d097fee682",
              "versionType": "git"
            },
            {
              "lessThan": "934b7778aa7b7c8f6bb073d2a73ba3674885bae0",
              "status": "affected",
              "version": "b95f5bcb811e3905b5376f87789da8d097fee682",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/hid/hid-hyperv.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "3.3"
            },
            {
              "lessThan": "3.3",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.267",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.218",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.185",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.154",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.106",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.47",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.11",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.1",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3-rc1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "cveTags": [],
  "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."
    }
  ],
  "id": "CVE-2026-80765",
  "lastModified": "2026-09-04T16:18:01.770",
  "metrics": {},
  "published": "2026-09-04T16:18:01.770",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/2529737763cb4bcfcaf397beeea2664656c865b4"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/334271d3812ab3197c95b4593bc6745f8d189114"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/390d3d9c52a710fdc9de95a537747397c0c671d1"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/608f8fd8c0f7b6268da43509447802955f210aac"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/8614c043b11cc35ffebd35542ab4da275f8f923d"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/934b7778aa7b7c8f6bb073d2a73ba3674885bae0"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/c894143c508a7e063aab9f73c9e835ab40121283"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/e0d5d3e45e142b7ef7525654aaa54d3e986002a6"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/f84d777574b748b1a488723ca7be9d87a301a872"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}



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