Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: iio: adc: at91-sama5d2_adc: Fix potential use-after-free in sama5d2_adc driver at91_adc_interrupt can call at91_adc_touch_data_handler function to start the work by schedule_work(&st->touch_st.workq). If we remove the module which will call at91_adc_remove to make cleanup, it will free indio_dev through iio_device_unregister but quite a bit later. While the work mentioned above will be used. The sequence of operations that may lead to a UAF bug is as follows: CPU0 CPU1 | at91_adc_workq_handler at91_adc_remove | iio_device_unregister(indio_dev) | //free indio_dev a bit later | | iio_push_to_buffers(indio_dev) | //use indio_dev Fix it by ensuring that the work is canceled before proceeding with the cleanup in at91_adc_remove.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 23ec2774f1cc168b1f32a2e0ed2709cb473bb94e before 4c83dd62595ee7b7c9298a4d19a256b6647e7240; affected 23ec2774f1cc168b1f32a2e0ed2709cb473bb94e before fdc8c835c637a3473878d1e7438c77ab8928af63; affected 23ec2774f1cc168b1f32a2e0ed2709cb473bb94e before 919d176b05776c7ede79c36744c823a07d631617; affected 23ec2774f1cc168b1f32a2e0ed2709cb473bb94e before 9795fe80976f8c31cafda7d44edfc0f532d1f7c4; affected 23ec2774f1cc168b1f32a2e0ed2709cb473bb94e before d7b6fc224c7f5d6d8adcb18037138d3cfe2bbdfe; affected 23ec2774f1cc168b1f32a2e0ed2709cb473bb94e before d890234a91570542c228a20f132ce74f9fedd904; affected 23ec2774f1cc168b1f32a2e0ed2709cb473bb94e before dbdb442218cd9d613adeab31a88ac973f22c4873 |
| Linux / Linux | affected 4.19; unaffected 0 before 4.19; unaffected 5.10.249 through 5.10.*; unaffected 5.15.199 through 5.15.*; unaffected 6.1.162 through 6.1.*; unaffected 6.6.122 through 6.6.*; unaffected 6.12.68 through 6.12.*; unaffected 6.18.8 through 6.18.*; unaffected 6.19 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/4c83dd62595ee7b7c9298a4d19a256b6647e7240
- https://git.kernel.org/stable/c/fdc8c835c637a3473878d1e7438c77ab8928af63
- https://git.kernel.org/stable/c/919d176b05776c7ede79c36744c823a07d631617
- https://git.kernel.org/stable/c/9795fe80976f8c31cafda7d44edfc0f532d1f7c4
- https://git.kernel.org/stable/c/d7b6fc224c7f5d6d8adcb18037138d3cfe2bbdfe
- https://git.kernel.org/stable/c/d890234a91570542c228a20f132ce74f9fedd904
- https://git.kernel.org/stable/c/dbdb442218cd9d613adeab31a88ac973f22c4873