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CVE-2026-80765

UnknownEPSS 0.19%

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. EPSS estimates a 0.19% chance of exploitation in the next 30 days.

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.

Metrics

EPSS Probability
0.19%

8.6th percentile

Probability of exploitation in the next 30 days. Learn more

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. The EPSS model estimates a 0.19% probability of exploitation in the next 30 days.
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