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CVE-2026-80765— HID: hyperv: validate initial device info bounds

Quick assessment

Affected
Linux Linux
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Linux kernel是美国Linux基金会开源的一个操作系统内核。 Linux kernel存在安全漏洞，该漏洞源于Hyper-V合成HID主机在提供SYNTH_HID_INITIAL_DEVICE_INFO消息时，mousevsc_on_receive_device_info()函数未检查bLength和wDescriptorLength字段是否超出接收到的VMBus数据包范围，导致guest在复制报告描述符时越界读取，恶意Hyper-V主机或后端可通过发送包含超长HID报告描述符长度的短消息导致g

AI Predicted 6.2 Difficulty: Moderate EPSS 0.19% · P9

Affected Version Matrix 20

VendorProduct Version RangeStatus
Linux Linux b95f5bcb811e3905b5376f87789da8d097fee682< e0d5d3e45e142b7ef7525654aaa54d3e986002a6 affected
b95f5bcb811e3905b5376f87789da8d097fee682< 390d3d9c52a710fdc9de95a537747397c0c671d1 affected
b95f5bcb811e3905b5376f87789da8d097fee682< 8614c043b11cc35ffebd35542ab4da275f8f923d affected
b95f5bcb811e3905b5376f87789da8d097fee682< 334271d3812ab3197c95b4593bc6745f8d189114 affected
b95f5bcb811e3905b5376f87789da8d097fee682< f84d777574b748b1a488723ca7be9d87a301a872 affected
b95f5bcb811e3905b5376f87789da8d097fee682< 608f8fd8c0f7b6268da43509447802955f210aac affected
b95f5bcb811e3905b5376f87789da8d097fee682< 2529737763cb4bcfcaf397beeea2664656c865b4 affected
b95f5bcb811e3905b5376f87789da8d097fee682< c894143c508a7e063aab9f73c9e835ab40121283 affected
… +12 more rows
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I. Basic Information for CVE-2026-80765

Vulnerability Information
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Vulnerability Title
HID: hyperv: validate initial device info bounds
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会开源的一个操作系统内核。 Linux kernel存在安全漏洞，该漏洞源于Hyper-V合成HID主机在提供SYNTH_HID_INITIAL_DEVICE_INFO消息时，mousevsc_on_receive_device_info()函数未检查bLength和wDescriptorLength字段是否超出接收到的VMBus数据包范围，导致guest在复制报告描述符时越界读取，恶意Hyper-V主机或后端可通过发送包含超长HID报告描述符长度的短消息导致g
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux b95f5bcb811e3905b5376f87789da8d097fee682 ~ e0d5d3e45e142b7ef7525654aaa54d3e986002a6 -
Linux Linux 3.3 -

II. Public POCs for CVE-2026-80765

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III. Intelligence Information for CVE-2026-80765

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Patches & Fixes for CVE-2026-80765 (7)

Other References for CVE-2026-80765 (2)

Same Patch Batch · Linux · 2026-09-04 · 156 CVEs total

CVE-2026-80865 bpf: Add missing access_ok call to copy_user_syms
CVE-2026-80856 fuse: fix invalidate lock leak on setattr writeback failure
CVE-2026-80857 fuse: wait for FR_FINISHED on abort_on_kill to prevent use-after-free
CVE-2026-80858 fuse: publish io-uring queues with release semantics
CVE-2026-80859 fuse: fix missing barrier when checking io-uring readiness
CVE-2026-80860 fuse: fix race between interrupt and resend
CVE-2026-80861 usb: xhci: bail out of setup if the controller is inaccessible
CVE-2026-80862 nvme-tcp: fix usage of page_frag_cache
CVE-2026-80863 RDMA/rxe: Fix OOB in free_rd_atomic_resources()
CVE-2026-80864 RDMA/rxe: Fix responder UAF on IB_QP_MAX_DEST_RD_ATOMIC modify_qp
CVE-2026-80870 drm/amdkfd: Validate CRIU-restored IDs before idr_alloc
CVE-2026-80874 arm64: dts: renesas: ironhide: Describe inline ECC carveouts
CVE-2026-80873 KVM: arm64: nv: Write ESR_EL2 for injected nested SError exceptions
CVE-2026-80872 ALSA: hda/tas2781: Cancel async firmware request at unbind
CVE-2026-80871 crypto: xilinx-trng - Remove crypto_rng interface
CVE-2026-80868 ntfs3: Allocate iomap inline_data using alloc_page
CVE-2026-80866 tipc: avoid busy looping in tipc_exit_net()
CVE-2026-80867 alpha/PCI: Add security_locked_down() check to pci_mmap_resource()
CVE-2026-80855 fuse: fix invalidate lock leak on open O_TRUNC DAX failure
CVE-2026-80869 ntfs: bound the attribute-list entry in ntfs_read_inode_mount()

Showing top 20 of 156 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-80765

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