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.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Linux Linux
Default version status: unaffected
f1a9a149abc86903e81dd1b2e720f3f89874384b to < c3597923932bb90d4fc2186aef552f6677175e4aaffectedf1a9a149abc86903e81dd1b2e720f3f89874384b to < e0c224c93d10ee38854fdf24c815108aedd3dcb3affectedf1a9a149abc86903e81dd1b2e720f3f89874384b to < 403cc9bd6ccb9fbe68d501c3236e5a6dd5504e14affectedf1a9a149abc86903e81dd1b2e720f3f89874384b to < 3d7a7bac4c75f25b2513505a0ac5ba909588ed2baffectedf1a9a149abc86903e81dd1b2e720f3f89874384b to < 9bdf8c7bfd79f1090e61d28f969b32880fd77bb3affectedf1a9a149abc86903e81dd1b2e720f3f89874384b to < 15b60ade825c8ce9ec560048a4ae3747e4572be3affectedf1a9a149abc86903e81dd1b2e720f3f89874384b to < 0bf253e9ac994cb5329bc87b00bb4eeca9136791affectedf1a9a149abc86903e81dd1b2e720f3f89874384b to < 2ef16934e069d5f771e989d6ee5c3ece5042f3cdaffectedf1a9a149abc86903e81dd1b2e720f3f89874384b to < 0af3b89705688af01aa06025b84fa7a1e06ba6ccaffected0e55072e7c63a6569cab1447e9025d160abd9dd9affected3.8.7 to < 3.9affected
Linux Linux
Default version status: affected
3.9affected0 to < 3.9unaffected5.10.269 to ≤ 5.10.*unaffected5.15.218 to ≤ 5.15.*unaffected6.1.185 to ≤ 6.1.*unaffected6.6.154 to ≤ 6.6.*unaffected6.12.106 to ≤ 6.12.*unaffected6.18.47 to ≤ 6.18.*unaffected7.1.11 to ≤ 7.1.*unaffected7.2.1 to ≤ 7.2.*unaffected7.3 to ≤ *unaffected
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 ↗