Description

In the Linux kernel, the following vulnerability has been resolved: Input: edt-ft5x06 - fix use-after-free in debugfs teardown The commit 68743c500c6e ("Input: edt-ft5x06 - use per-client debugfs directory") removed the manual debugfs teardown, relying on the I2C core to handle it. However, this creates a window where debugfs files are still accessible after edt_ft5x06_ts_teardown_debugfs() frees tsdata->raw_buffer. To prevent a use-after-free, protect the freeing of raw_buffer with the device mutex and set raw_buffer to NULL. The debugfs read function already checks if raw_buffer is NULL under the same mutex, so this safely avoids the use-after-free.

References 3

• git.kernel.org https://git.kernel.org/stable/c/9f6c5e7b747d40e1c65cbfcb975857d25154c075
• git.kernel.org https://git.kernel.org/stable/c/a516d43886623e3cca5fa3446bed8fc7c7982be2
• git.kernel.org https://git.kernel.org/stable/c/f5f9e07060519e2287e99019a6de1eb3ebb65c37

Remediation