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CVE-2026-80765

Unknown

Last modified

CVE-2026-80765 is a vulnerability of currently unknown severity. 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.

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.

Affected Software

Source: CNA advisory (CVE.org). NVD analysis pending.

VendorProductVersions
LinuxLinux>= b95f5bcb811e3905b5376f87789da8d097fee682, < e0d5d3e45e142b7ef7525654aaa54d3e986002a6; >= b95f5bcb811e3905b5376f87789da8d097fee682, < 390d3d9c52a710fdc9de95a537747397c0c671d1; >= b95f5bcb811e3905b5376f87789da8d097fee682, < 8614c043b11cc35ffebd35542ab4da275f8f923d; >= b95f5bcb811e3905b5376f87789da8d097fee682, < 334271d3812ab3197c95b4593bc6745f8d189114; >= b95f5bcb811e3905b5376f87789da8d097fee682, < f84d777574b748b1a488723ca7be9d87a301a872; >= b95f5bcb811e3905b5376f87789da8d097fee682, < 608f8fd8c0f7b6268da43509447802955f210aac; >= b95f5bcb811e3905b5376f87789da8d097fee682, < 2529737763cb4bcfcaf397beeea2664656c865b4; >= b95f5bcb811e3905b5376f87789da8d097fee682, < c894143c508a7e063aab9f73c9e835ab40121283; >= b95f5bcb811e3905b5376f87789da8d097fee682, < 934b7778aa7b7c8f6bb073d2a73ba3674885bae0
LinuxLinux3.3

References

Timeline

Published
Last Modified
Status
Received

Frequently Asked Questions

What is 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.
How severe is CVE-2026-80765?
Severity scoring for CVE-2026-80765 is pending analysis.
How do I fix CVE-2026-80765?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST