Description (CNA)
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.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected f1a9a149abc86903e81dd1b2e720f3f89874384b before c3597923932bb90d4fc2186aef552f6677175e4a; affected f1a9a149abc86903e81dd1b2e720f3f89874384b before e0c224c93d10ee38854fdf24c815108aedd3dcb3; affected f1a9a149abc86903e81dd1b2e720f3f89874384b before 403cc9bd6ccb9fbe68d501c3236e5a6dd5504e14; affected f1a9a149abc86903e81dd1b2e720f3f89874384b before 3d7a7bac4c75f25b2513505a0ac5ba909588ed2b; affected f1a9a149abc86903e81dd1b2e720f3f89874384b before 9bdf8c7bfd79f1090e61d28f969b32880fd77bb3; affected f1a9a149abc86903e81dd1b2e720f3f89874384b before 15b60ade825c8ce9ec560048a4ae3747e4572be3; affected f1a9a149abc86903e81dd1b2e720f3f89874384b before 0bf253e9ac994cb5329bc87b00bb4eeca9136791; affected f1a9a149abc86903e81dd1b2e720f3f89874384b before 2ef16934e069d5f771e989d6ee5c3ece5042f3cd; affected f1a9a149abc86903e81dd1b2e720f3f89874384b before 0af3b89705688af01aa06025b84fa7a1e06ba6cc; affected 0e55072e7c63a6569cab1447e9025d160abd9dd9; affected 3.8.7 before 3.9 |
| Linux / Linux | affected 3.9; unaffected 0 before 3.9; unaffected 5.10.269 through 5.10.*; unaffected 5.15.218 through 5.15.*; unaffected 6.1.185 through 6.1.*; unaffected 6.6.154 through 6.6.*; unaffected 6.12.106 through 6.12.*; unaffected 6.18.47 through 6.18.*; unaffected 7.1.11 through 7.1.*; unaffected 7.2.1 through 7.2.*; unaffected 7.3 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/c3597923932bb90d4fc2186aef552f6677175e4a
- https://git.kernel.org/stable/c/e0c224c93d10ee38854fdf24c815108aedd3dcb3
- https://git.kernel.org/stable/c/403cc9bd6ccb9fbe68d501c3236e5a6dd5504e14
- https://git.kernel.org/stable/c/3d7a7bac4c75f25b2513505a0ac5ba909588ed2b
- https://git.kernel.org/stable/c/9bdf8c7bfd79f1090e61d28f969b32880fd77bb3
- https://git.kernel.org/stable/c/15b60ade825c8ce9ec560048a4ae3747e4572be3
- https://git.kernel.org/stable/c/0bf253e9ac994cb5329bc87b00bb4eeca9136791
- https://git.kernel.org/stable/c/2ef16934e069d5f771e989d6ee5c3ece5042f3cd
- https://git.kernel.org/stable/c/0af3b89705688af01aa06025b84fa7a1e06ba6cc