CVE-2026-80765

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.

CVSS

No CVSS.

References

Link	Resource
https://git.kernel.org/stable/c/2529737763cb4bcfcaf397beeea2664656c865b4
https://git.kernel.org/stable/c/334271d3812ab3197c95b4593bc6745f8d189114
https://git.kernel.org/stable/c/390d3d9c52a710fdc9de95a537747397c0c671d1
https://git.kernel.org/stable/c/608f8fd8c0f7b6268da43509447802955f210aac
https://git.kernel.org/stable/c/8614c043b11cc35ffebd35542ab4da275f8f923d
https://git.kernel.org/stable/c/934b7778aa7b7c8f6bb073d2a73ba3674885bae0
https://git.kernel.org/stable/c/c894143c508a7e063aab9f73c9e835ab40121283
https://git.kernel.org/stable/c/e0d5d3e45e142b7ef7525654aaa54d3e986002a6
https://git.kernel.org/stable/c/f84d777574b748b1a488723ca7be9d87a301a872

Configurations

No configuration.

History

No history.

Information

Published : 2026-09-04 16:18

Updated : 2026-09-04 16:18

NVD link : CVE-2026-80765

Mitre link : CVE-2026-80765

CVE.ORG link : CVE-2026-80765

JSON object : View

Products Affected

No product.

CWE

No CWE.

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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."}], "lastModified": "2026-09-04T16:18:01.770", "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}