CVE-2026-80765

HID: hyperv: validate initial device info bounds

State: Published
Severity: Not scored
Published: Sep 4, 2026
Updated: Oct 19, 2026
Reserved: Aug 26, 2026

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.

Scores

The record has no CVSS score.

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
LinuxLinux	b95f5bcb811e3905b5376f87789da8d097fee682 to before e0d5d3e45e142b7ef7525654aaa54d3e986002a6Affected b95f5bcb811e3905b5376f87789da8d097fee682 to before 390d3d9c52a710fdc9de95a537747397c0c671d1Affected b95f5bcb811e3905b5376f87789da8d097fee682 to before 8614c043b11cc35ffebd35542ab4da275f8f923dAffected b95f5bcb811e3905b5376f87789da8d097fee682 to before 334271d3812ab3197c95b4593bc6745f8d189114Affected b95f5bcb811e3905b5376f87789da8d097fee682 to before f84d777574b748b1a488723ca7be9d87a301a872Affected b95f5bcb811e3905b5376f87789da8d097fee682 to before 608f8fd8c0f7b6268da43509447802955f210aacAffected b95f5bcb811e3905b5376f87789da8d097fee682 to before 2529737763cb4bcfcaf397beeea2664656c865b4Affected b95f5bcb811e3905b5376f87789da8d097fee682 to before c894143c508a7e063aab9f73c9e835ab40121283Affected b95f5bcb811e3905b5376f87789da8d097fee682 to before 934b7778aa7b7c8f6bb073d2a73ba3674885bae0Affected
LinuxLinux	3.3Affected before 3.3Not affected 5.10.267 through 5.10.Not affected 5.15.218 through 5.15.Not affected 6.1.185 through 6.1.Not affected 6.6.154 through 6.6.Not affected 6.12.106 through 6.12.Not affected 6.18.47 through 6.18.Not affected 7.1.11 through 7.1.Not affected 7.2.1 through 7.2.Not affected 7.3 and laterNot affected

Product

Versions

LinuxLinux

b95f5bcb811e3905b5376f87789da8d097fee682 to before e0d5d3e45e142b7ef7525654aaa54d3e986002a6Affected
b95f5bcb811e3905b5376f87789da8d097fee682 to before 390d3d9c52a710fdc9de95a537747397c0c671d1Affected
b95f5bcb811e3905b5376f87789da8d097fee682 to before 8614c043b11cc35ffebd35542ab4da275f8f923dAffected
b95f5bcb811e3905b5376f87789da8d097fee682 to before 334271d3812ab3197c95b4593bc6745f8d189114Affected
b95f5bcb811e3905b5376f87789da8d097fee682 to before f84d777574b748b1a488723ca7be9d87a301a872Affected
b95f5bcb811e3905b5376f87789da8d097fee682 to before 608f8fd8c0f7b6268da43509447802955f210aacAffected
b95f5bcb811e3905b5376f87789da8d097fee682 to before 2529737763cb4bcfcaf397beeea2664656c865b4Affected
b95f5bcb811e3905b5376f87789da8d097fee682 to before c894143c508a7e063aab9f73c9e835ab40121283Affected
b95f5bcb811e3905b5376f87789da8d097fee682 to before 934b7778aa7b7c8f6bb073d2a73ba3674885bae0Affected

LinuxLinux

3.3Affected
before 3.3Not affected
5.10.267 through 5.10.*Not affected
5.15.218 through 5.15.*Not affected
6.1.185 through 6.1.*Not affected
6.6.154 through 6.6.*Not affected
6.12.106 through 6.12.*Not affected
6.18.47 through 6.18.*Not affected
7.1.11 through 7.1.*Not affected
7.2.1 through 7.2.*Not affected
7.3 and laterNot affected

References

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