CVE-2026-80765
Description
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.
How to fix
- Linux Linuxe0d5d3e45e142b7ef7525654aaa54d3e986002a6, 390d3d9c52a710fdc9de95a537747397c0c671d1, 8614c043b11cc35ffebd35542ab4da275f8f923d, 334271d3812ab3197c95b4593bc6745f8d189114, f84d777574b748b1a488723ca7be9d87a301a872, 608f8fd8c0f7b6268da43509447802955f210aac, 2529737763cb4bcfcaf397beeea2664656c865b4, c894143c508a7e063aab9f73c9e835ab40121283, 934b7778aa7b7c8f6bb073d2a73ba3674885bae0 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Linux Linux | b95f5bcb811e3905b5376f87789da8d097fee682 ≤ v < e0d5d3e45e142b7ef7525654aaa54d3e986002a6, b95f5bcb811e3905b5376f87789da8d097fee682 ≤ v < 390d3d9c52a710fdc9de95a537747397c0c671d1, b95f5bcb811e3905b5376f87789da8d097fee682 ≤ v < 8614c043b11cc35ffebd35542ab4da275f8f923d, b95f5bcb811e3905b5376f87789da8d097fee682 ≤ v < 334271d3812ab3197c95b4593bc6745f8d189114, b95f5bcb811e3905b5376f87789da8d097fee682 ≤ v < f84d777574b748b1a488723ca7be9d87a301a872, b95f5bcb811e3905b5376f87789da8d097fee682 ≤ v < 608f8fd8c0f7b6268da43509447802955f210aac, b95f5bcb811e3905b5376f87789da8d097fee682 ≤ v < 2529737763cb4bcfcaf397beeea2664656c865b4, b95f5bcb811e3905b5376f87789da8d097fee682 ≤ v < c894143c508a7e063aab9f73c9e835ab40121283, b95f5bcb811e3905b5376f87789da8d097fee682 ≤ v < 934b7778aa7b7c8f6bb073d2a73ba3674885bae0, 3.3 | e0d5d3e45e142b7ef7525654aaa54d3e986002a6, 390d3d9c52a710fdc9de95a537747397c0c671d1, 8614c043b11cc35ffebd35542ab4da275f8f923d, 334271d3812ab3197c95b4593bc6745f8d189114, f84d777574b748b1a488723ca7be9d87a301a872, 608f8fd8c0f7b6268da43509447802955f210aac, 2529737763cb4bcfcaf397beeea2664656c865b4, c894143c508a7e063aab9f73c9e835ab40121283, 934b7778aa7b7c8f6bb073d2a73ba3674885bae0 |
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