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CVE-2026-80782

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

Published
Last modified
published
Not listed in CISA KEV
Fix
Fixed in 3.9, 5.10.269, 5.15.218, 6.1.185, 6.6.154, and 4 more
None on Exploit-DB, Metasploit or GitHub

Summary

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.

Timeline

  1. CVE published
  2. Record last updated

Affected versions

  • Linux Linux

    From f1a9a149abc86903e81dd1b2e720f3f89874384b · fixed in c3597923932bb90d4fc2186aef552f6677175e4a; From f1a9a149abc86903e81dd1b2e720f3f89874384b · fixed in e0c224c93d10ee38854fdf24c815108aedd3dcb3; From f1a9a149abc86903e81dd1b2e720f3f89874384b · fixed in 403cc9bd6ccb9fbe68d501c3236e5a6dd5504e14; From f1a9a149abc86903e81dd1b2e720f3f89874384b · fixed in 3d7a7bac4c75f25b2513505a0ac5ba909588ed2b; From f1a9a149abc86903e81dd1b2e720f3f89874384b · fixed in 9bdf8c7bfd79f1090e61d28f969b32880fd77bb3; From f1a9a149abc86903e81dd1b2e720f3f89874384b · fixed in 15b60ade825c8ce9ec560048a4ae3747e4572be3; From f1a9a149abc86903e81dd1b2e720f3f89874384b · fixed in 0bf253e9ac994cb5329bc87b00bb4eeca9136791; From f1a9a149abc86903e81dd1b2e720f3f89874384b · fixed in 2ef16934e069d5f771e989d6ee5c3ece5042f3cd; From f1a9a149abc86903e81dd1b2e720f3f89874384b · fixed in 0af3b89705688af01aa06025b84fa7a1e06ba6cc; From 3.8.7 · fixed in 3.9

  • Linux Linux

    3.9

  • KernelLinux

    From 3.9.0 · fixed in 5.10.269; From 5.11.0 · fixed in 5.15.218; From 5.16.0 · fixed in 6.1.185; From 6.2.0 · fixed in 6.6.154; From 6.7.0 · fixed in 6.12.106; From 6.13.0 · fixed in 6.18.47; From 6.19.0 · fixed in 7.1.11; From 7.2.0 · fixed in 7.2.1

References 9

git.kernel.org