UNKNOWN NVD
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 S
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
- 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
This unknown severity vulnerability was published on 2026-09-04 via NVD.
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