CVE-2025-21685 - Lenovo Yoga Tab 2 Pro 1380 Fastcharger Serdev NULL Pointer Dereference Vulnerability

CVE-2025-21685 - Lenovo Yoga Tab 2 Pro 1380 Fastcharger Serdev NULL Pointer Dereference Vulnerability

https://cvefeed.io/rssfeed/latest.atom / Sun, 02/09/2025 - 15:14
CVE ID : CVE-2025-21685
Published : Feb. 9, 2025, 12:15 p.m. | 1 hour ago
Description : In the Linux kernel, the following vulnerability has been resolved: platform/x86: lenovo-yoga-tab2-pro-1380-fastcharger: fix serdev race The yt2_1380_fc_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.
Severity: 0.0 | NA
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