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

No CVSS v4.0

No CVSS v3.1

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Key SSVC decision points have not yet been added.

Affected Vendors & Products

Vendors Products
Linux
  • Linux Kernel

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References
Link Providers
https://git.kernel.org/stable/c/2529737763cb4bcfcaf397beeea2664656c865b4 cve-icon cve-icon
https://git.kernel.org/stable/c/334271d3812ab3197c95b4593bc6745f8d189114 cve-icon cve-icon
https://git.kernel.org/stable/c/390d3d9c52a710fdc9de95a537747397c0c671d1 cve-icon cve-icon
https://git.kernel.org/stable/c/608f8fd8c0f7b6268da43509447802955f210aac cve-icon cve-icon
https://git.kernel.org/stable/c/8614c043b11cc35ffebd35542ab4da275f8f923d cve-icon cve-icon
https://git.kernel.org/stable/c/934b7778aa7b7c8f6bb073d2a73ba3674885bae0 cve-icon cve-icon
https://git.kernel.org/stable/c/c894143c508a7e063aab9f73c9e835ab40121283 cve-icon cve-icon
https://git.kernel.org/stable/c/e0d5d3e45e142b7ef7525654aaa54d3e986002a6 cve-icon cve-icon
https://git.kernel.org/stable/c/f84d777574b748b1a488723ca7be9d87a301a872 cve-icon cve-icon
History

Fri, 04 Sep 2026 21:45:00 +0000

Type Values Removed Values Added
Weaknesses CWE-125

Fri, 04 Sep 2026 15:30:00 +0000

Type Values Removed Values Added
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.
Title HID: hyperv: validate initial device info bounds
First Time appeared Linux
Linux linux Kernel
CPEs cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Vendors & Products Linux
Linux linux Kernel
References
cve-icon MITRE

Status: PUBLISHED

Assigner: Linux

Published: 2026-09-04T15:12:37.639Z

Updated: 2026-09-04T15:12:37.639Z

Reserved: 2026-08-26T14:34:25.791Z

Link: CVE-2026-80765

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-09-04T16:18:01.770

Modified: 2026-09-04T16:18:01.770

Link: CVE-2026-80765

cve-icon Redhat

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