Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: platform/x86: dell-uart-backlight: fix serdev race The dell_uart_bl_serdev_probe() function calls devm_serdev_device_open() before setting the client ops via serdev_device_set_client_ops(). This ordering can trigger a NULL pointer dereference in the serdev controller's receive_buf handler, as it assumes serdev->ops is valid when SERPORT_ACTIVE is set. This is similar to the issue fixed in commit 5e700b384ec1 ("platform/chrome: cros_ec_uart: properly fix race condition") where devm_serdev_device_open() was called before fully initializing the device. Fix the race by ensuring client ops are set before enabling the port via devm_serdev_device_open(). Note, serdev_device_set_baudrate() and serdev_device_set_flow_control() calls should be after the devm_serdev_device_open() call.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 484bae9e4d6acb5eec39e1ea47f9aa43f11b154d before d3a24d923333f75aaece9acb051d676edc0afb75; affected 484bae9e4d6acb5eec39e1ea47f9aa43f11b154d before 1b2128aa2d45ab20b22548dcf4b48906298ca7fd |
| Linux / Linux | affected 6.10; unaffected 0 before 6.10; unaffected 6.12.11 through 6.12.*; unaffected 6.13 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/d3a24d923333f75aaece9acb051d676edc0afb75
- https://git.kernel.org/stable/c/1b2128aa2d45ab20b22548dcf4b48906298ca7fd
ADP enrichment
No English description supplied.
No references supplied.