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CVE-2026-80782— HID: magicmouse: do not keep a stale msc->input if no input is claimed

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HID magicmouse驱动在hidinput_connect失败时未清除缓存的msc->input，导致悬空指针，后续输入报告解引用已释放内存，可能导致释放后重用。

AI Predicted 7.8 Difficulty: Moderate EPSS 0.19% · P9

Possible ATT&CK Techniques 1 AI

T1200 · Hardware Additions

Affected Version Matrix 22

VendorProduct Version RangeStatus
Linux Linux f1a9a149abc86903e81dd1b2e720f3f89874384b< c3597923932bb90d4fc2186aef552f6677175e4a affected
f1a9a149abc86903e81dd1b2e720f3f89874384b< e0c224c93d10ee38854fdf24c815108aedd3dcb3 affected
f1a9a149abc86903e81dd1b2e720f3f89874384b< 403cc9bd6ccb9fbe68d501c3236e5a6dd5504e14 affected
f1a9a149abc86903e81dd1b2e720f3f89874384b< 3d7a7bac4c75f25b2513505a0ac5ba909588ed2b affected
f1a9a149abc86903e81dd1b2e720f3f89874384b< 9bdf8c7bfd79f1090e61d28f969b32880fd77bb3 affected
f1a9a149abc86903e81dd1b2e720f3f89874384b< 15b60ade825c8ce9ec560048a4ae3747e4572be3 affected
f1a9a149abc86903e81dd1b2e720f3f89874384b< 0bf253e9ac994cb5329bc87b00bb4eeca9136791 affected
f1a9a149abc86903e81dd1b2e720f3f89874384b< 2ef16934e069d5f771e989d6ee5c3ece5042f3cd affected
… +14 more rows
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I. Basic Information for CVE-2026-80782

Vulnerability Information
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Vulnerability Title
HID: magicmouse: do not keep a stale msc->input if no input is claimed
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: HID: magicmouse: do not keep a stale msc->input if no input is claimed magicmouse_input_mapping() caches the first hid_input's input_dev in msc->input while the report descriptor is parsed, and the rest of the driver treats a non-NULL msc->input as proof that an input device was registered. That does not hold on the hid-input error path. If hidinput_connect() fails -- for instance because input_register_device() returns an error -- it unwinds through hidinput_disconnect(), which frees every input_dev it created, including the one cached in msc->input. The failure does not abort the probe. hid_connect() only skips the claim: if ((connect_mask & HID_CONNECT_HIDINPUT) && !hidinput_connect(hdev, connect_mask & HID_CONNECT_HIDINPUT_FORCE)) hdev->claimed |= HID_CLAIMED_INPUT; and the "device has no listeners" bailout below it does not fire for this driver, which sets ->raw_event; on the USB Magic Mouse 2 / Magic Trackpad 2 paths hidraw and hiddev are claimed as well. hid_hw_start() therefore returns 0 and magicmouse_probe() continues with msc->input pointing at freed memory. Being non-NULL, it passes the "input not registered" check in probe and the NULL checks in ->raw_event and ->event, so the next input report dereferences freed memory. Clear msc->input when the HID core did not claim an input device, so the existing NULL checks cover this case as well.
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HID magicmouse驱动在hidinput_connect失败时未清除缓存的msc->input，导致悬空指针，后续输入报告解引用已释放内存，可能导致释放后重用。
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 f1a9a149abc86903e81dd1b2e720f3f89874384b ~ c3597923932bb90d4fc2186aef552f6677175e4a -
Linux Linux 3.9 -

II. Public POCs for CVE-2026-80782

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III. Intelligence Information for CVE-2026-80782

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Patches & Fixes for CVE-2026-80782 (7)

Other References for CVE-2026-80782 (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-2026-80782

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