Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: HID: lg-g15: cancel pending work on remove to fix a use-after-free lg_g15_data is allocated with devm and holds a work item. The report handlers schedule that work straight from device input. lg_g15_event() and lg_g15_v2_event() do it on the backlight cycle key, and lg_g510_leds_event() does it too. The worker dereferences the lg_g15_data back through container_of. The driver had no remove callback and never cancelled the work. So if a report scheduled the work and the keyboard was then unplugged, devres freed lg_g15_data while the work was still pending or running, and the worker touched freed memory. This is a use-after-free. It is reachable as a race on device unplug. Add a remove callback that cancels the work before devres frees the state. g15->work is only initialized for the models that schedule it (G15, G15 v2, G510). The G13 and Z-10 leave it zeroed, so guard the cancel on g15->work.func to avoid cancelling a work that was never set up. The g15 NULL test mirrors the one already in lg_g15_raw_event().
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 97b741aba918c4143f4208d2421d08ff215c1b49 before 3b9a3919aac6977262f04d5365c0456877522a44; affected 97b741aba918c4143f4208d2421d08ff215c1b49 before 4aef9676c26dff8723b56834951cfc6b618f0986; affected 97b741aba918c4143f4208d2421d08ff215c1b49 before acce9dee807f21184fff19ad17c8ed464247e7f7; affected 97b741aba918c4143f4208d2421d08ff215c1b49 before 33cd1a000daf929356aacf2b191d31714ff0615e; affected 97b741aba918c4143f4208d2421d08ff215c1b49 before dfc6e61f83113cc18346b6988f07271c0063357d; affected 97b741aba918c4143f4208d2421d08ff215c1b49 before 4d0d51bc12d246accbfbb94de05d729c68c9b8fb; affected 97b741aba918c4143f4208d2421d08ff215c1b49 before 8131f4226688c4be5f30874d167e44dab838eb09; affected 97b741aba918c4143f4208d2421d08ff215c1b49 before 7705b4140d188ce22656f6e541ae7ef834c7e11a |
| Linux / Linux | affected 5.5; unaffected 0 before 5.5; unaffected 5.10.261 through 5.10.*; unaffected 5.15.212 through 5.15.*; unaffected 6.1.178 through 6.1.*; unaffected 6.6.145 through 6.6.*; unaffected 6.12.96 through 6.12.*; unaffected 6.18.39 through 6.18.*; unaffected 7.1.4 through 7.1.*; unaffected 7.2 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/3b9a3919aac6977262f04d5365c0456877522a44
- https://git.kernel.org/stable/c/4aef9676c26dff8723b56834951cfc6b618f0986
- https://git.kernel.org/stable/c/acce9dee807f21184fff19ad17c8ed464247e7f7
- https://git.kernel.org/stable/c/33cd1a000daf929356aacf2b191d31714ff0615e
- https://git.kernel.org/stable/c/dfc6e61f83113cc18346b6988f07271c0063357d
- https://git.kernel.org/stable/c/4d0d51bc12d246accbfbb94de05d729c68c9b8fb
- https://git.kernel.org/stable/c/8131f4226688c4be5f30874d167e44dab838eb09
- https://git.kernel.org/stable/c/7705b4140d188ce22656f6e541ae7ef834c7e11a