Vulnerability-Lookup

GHSA-CJ68-X55R-245C

Vulnerability from github – Published: 2026-09-04 18:31 – Updated: 2026-09-04 18:31

Details

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.

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{
  "affected": [],
  "aliases": [
    "CVE-2026-80765"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-09-04T16:18:01Z",
    "severity": null
  },
  "details": "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": "GHSA-cj68-x55r-245c",
  "modified": "2026-09-04T18:31:25Z",
  "published": "2026-09-04T18:31:24Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-80765"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/2529737763cb4bcfcaf397beeea2664656c865b4"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/334271d3812ab3197c95b4593bc6745f8d189114"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/390d3d9c52a710fdc9de95a537747397c0c671d1"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/608f8fd8c0f7b6268da43509447802955f210aac"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8614c043b11cc35ffebd35542ab4da275f8f923d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/934b7778aa7b7c8f6bb073d2a73ba3674885bae0"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c894143c508a7e063aab9f73c9e835ab40121283"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e0d5d3e45e142b7ef7525654aaa54d3e986002a6"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f84d777574b748b1a488723ca7be9d87a301a872"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

CVE-2026-80765 (GCVE-0-2026-80765)

Vulnerability from cvelistv5 – Published: 2026-09-04 15:12 – Updated: 2026-09-04 15:12

Title

HID: hyperv: validate initial device info bounds

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.

Severity

No CVSS data available.

Assigner

Linux mitre root

References

9 references

URL	Tags
https://git.kernel.org/stable/c/e0d5d3e45e142b7ef…
https://git.kernel.org/stable/c/390d3d9c52a710fdc…
https://git.kernel.org/stable/c/8614c043b11cc35ff…
https://git.kernel.org/stable/c/334271d3812ab3197…
https://git.kernel.org/stable/c/f84d777574b748b1a…
https://git.kernel.org/stable/c/608f8fd8c0f7b6268…
https://git.kernel.org/stable/c/2529737763cb4bcfc…
https://git.kernel.org/stable/c/c894143c508a7e063…
https://git.kernel.org/stable/c/934b7778aa7b7c8f6…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: b95f5bcb811e3905b5376f87789da8d097fee682 , < e0d5d3e45e142b7ef7525654aaa54d3e986002a6 (git) Affected: b95f5bcb811e3905b5376f87789da8d097fee682 , < 390d3d9c52a710fdc9de95a537747397c0c671d1 (git) Affected: b95f5bcb811e3905b5376f87789da8d097fee682 , < 8614c043b11cc35ffebd35542ab4da275f8f923d (git) Affected: b95f5bcb811e3905b5376f87789da8d097fee682 , < 334271d3812ab3197c95b4593bc6745f8d189114 (git) Affected: b95f5bcb811e3905b5376f87789da8d097fee682 , < f84d777574b748b1a488723ca7be9d87a301a872 (git) Affected: b95f5bcb811e3905b5376f87789da8d097fee682 , < 608f8fd8c0f7b6268da43509447802955f210aac (git) Affected: b95f5bcb811e3905b5376f87789da8d097fee682 , < 2529737763cb4bcfcaf397beeea2664656c865b4 (git) Affected: b95f5bcb811e3905b5376f87789da8d097fee682 , < c894143c508a7e063aab9f73c9e835ab40121283 (git) Affected: b95f5bcb811e3905b5376f87789da8d097fee682 , < 934b7778aa7b7c8f6bb073d2a73ba3674885bae0 (git)
Linux	Linux	Affected: 3.3 Unaffected: 0 , < 3.3 (semver) Unaffected: 5.10.267 , ≤ 5.10.* (semver) Unaffected: 5.15.218 , ≤ 5.15.* (semver) Unaffected: 6.1.185 , ≤ 6.1.* (semver) Unaffected: 6.6.154 , ≤ 6.6.* (semver) Unaffected: 6.12.106 , ≤ 6.12.* (semver) Unaffected: 6.18.47 , ≤ 6.18.* (semver) Unaffected: 7.1.11 , ≤ 7.1.* (semver) Unaffected: 7.2.1 , ≤ 7.2.* (semver) Unaffected: 7.3-rc1 , ≤ * (original_commit_for_fix)

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{
  "containers": {
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        {
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          "product": "Linux",
          "programFiles": [
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          "vendor": "Linux",
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              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.267",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
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              "versionType": "semver"
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            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.185",
              "versionType": "semver"
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            {
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              "status": "unaffected",
              "version": "6.6.154",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.106",
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            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
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              "versionType": "original_commit_for_fix"
            }
          ]
        }
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}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.

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GHSA-CJ68-X55R-245C

CVE-2026-80765 (GCVE-0-2026-80765)

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Sightings

Nomenclature